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

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2011 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-agn.h"
  44 #include "iwl-helpers.h"
  45 #include "iwl-shared.h"
  46 #include "iwl-agn.h"
  47 #include "iwl-trans.h"
  48
  49 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
  50
  51 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
  52 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
  53 static void iwl_init_ht_hw_capab(const struct iwl_priv *priv,
  54                               struct ieee80211_sta_ht_cap *ht_info,
  55                               enum ieee80211_band band)
  56 {
  57         u16 max_bit_rate = 0;
  58         u8 rx_chains_num = hw_params(priv).rx_chains_num;
  59         u8 tx_chains_num = hw_params(priv).tx_chains_num;
  60
  61         ht_info->cap = 0;
  62         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
  63
  64         ht_info->ht_supported = true;
  65
  66         if (priv->cfg->ht_params &&
  67             priv->cfg->ht_params->ht_greenfield_support)
  68                 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
  69         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
  70         max_bit_rate = MAX_BIT_RATE_20_MHZ;
  71         if (hw_params(priv).ht40_channel & BIT(band)) {
  72                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
  73                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
  74                 ht_info->mcs.rx_mask[4] = 0x01;
  75                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
  76         }
  77
  78         if (iwlagn_mod_params.amsdu_size_8K)
  79                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
  80
  81         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
  82         if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_factor)
  83                 ht_info->ampdu_factor = priv->cfg->bt_params->ampdu_factor;
  84         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
  85         if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_density)
  86                 ht_info->ampdu_density = priv->cfg->bt_params->ampdu_density;
  87
  88         ht_info->mcs.rx_mask[0] = 0xFF;
  89         if (rx_chains_num >= 2)
  90                 ht_info->mcs.rx_mask[1] = 0xFF;
  91         if (rx_chains_num >= 3)
  92                 ht_info->mcs.rx_mask[2] = 0xFF;
  93
  94         /* Highest supported Rx data rate */
  95         max_bit_rate *= rx_chains_num;
  96         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
  97         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
  98
  99         /* Tx MCS capabilities */
 100         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 101         if (tx_chains_num != rx_chains_num) {
 102                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 103                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 104                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 105         }
 106 }
 107
 108 /**
 109  * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
 110  */
 111 int iwl_init_geos(struct iwl_priv *priv)
 112 {
 113         struct iwl_channel_info *ch;
 114         struct ieee80211_supported_band *sband;
 115         struct ieee80211_channel *channels;
 116         struct ieee80211_channel *geo_ch;
 117         struct ieee80211_rate *rates;
 118         int i = 0;
 119         s8 max_tx_power = IWLAGN_TX_POWER_TARGET_POWER_MIN;
 120
 121         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 122             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 123                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 124                 set_bit(STATUS_GEO_CONFIGURED, &priv->shrd->status);
 125                 return 0;
 126         }
 127
 128         channels = kzalloc(sizeof(struct ieee80211_channel) *
 129                            priv->channel_count, GFP_KERNEL);
 130         if (!channels)
 131                 return -ENOMEM;
 132
 133         rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
 134                         GFP_KERNEL);
 135         if (!rates) {
 136                 kfree(channels);
 137                 return -ENOMEM;
 138         }
 139
 140         /* 5.2GHz channels start after the 2.4GHz channels */
 141         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 142         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 143         /* just OFDM */
 144         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 145         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
 146
 147         if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
 148                 iwl_init_ht_hw_capab(priv, &sband->ht_cap,
 149                                          IEEE80211_BAND_5GHZ);
 150
 151         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 152         sband->channels = channels;
 153         /* OFDM & CCK */
 154         sband->bitrates = rates;
 155         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
 156
 157         if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
 158                 iwl_init_ht_hw_capab(priv, &sband->ht_cap,
 159                                          IEEE80211_BAND_2GHZ);
 160
 161         priv->ieee_channels = channels;
 162         priv->ieee_rates = rates;
 163
 164         for (i = 0;  i < priv->channel_count; i++) {
 165                 ch = &priv->channel_info[i];
 166
 167                 /* FIXME: might be removed if scan is OK */
 168                 if (!is_channel_valid(ch))
 169                         continue;
 170
 171                 sband =  &priv->bands[ch->band];
 172
 173                 geo_ch = &sband->channels[sband->n_channels++];
 174
 175                 geo_ch->center_freq =
 176                         ieee80211_channel_to_frequency(ch->channel, ch->band);
 177                 geo_ch->max_power = ch->max_power_avg;
 178                 geo_ch->max_antenna_gain = 0xff;
 179                 geo_ch->hw_value = ch->channel;
 180
 181                 if (is_channel_valid(ch)) {
 182                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 183                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 184
 185                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 186                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 187
 188                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 189                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 190
 191                         geo_ch->flags |= ch->ht40_extension_channel;
 192
 193                         if (ch->max_power_avg > max_tx_power)
 194                                 max_tx_power = ch->max_power_avg;
 195                 } else {
 196                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 197                 }
 198
 199                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 200                                 ch->channel, geo_ch->center_freq,
 201                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 202                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 203                                 "restricted" : "valid",
 204                                  geo_ch->flags);
 205         }
 206
 207         priv->tx_power_device_lmt = max_tx_power;
 208         priv->tx_power_user_lmt = max_tx_power;
 209         priv->tx_power_next = max_tx_power;
 210
 211         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 212              priv->cfg->sku & EEPROM_SKU_CAP_BAND_52GHZ) {
 213                 char buf[32];
 214                 bus_get_hw_id(priv->bus, buf, sizeof(buf));
 215                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 216                         "Please send your %s to maintainer.\n", buf);
 217                 priv->cfg->sku &= ~EEPROM_SKU_CAP_BAND_52GHZ;
 218         }
 219
 220         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 221                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 222                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 223
 224         set_bit(STATUS_GEO_CONFIGURED, &priv->shrd->status);
 225
 226         return 0;
 227 }
 228
 229 /*
 230  * iwl_free_geos - undo allocations in iwl_init_geos
 231  */
 232 void iwl_free_geos(struct iwl_priv *priv)
 233 {
 234         kfree(priv->ieee_channels);
 235         kfree(priv->ieee_rates);
 236         clear_bit(STATUS_GEO_CONFIGURED, &priv->shrd->status);
 237 }
 238
 239 static bool iwl_is_channel_extension(struct iwl_priv *priv,
 240                                      enum ieee80211_band band,
 241                                      u16 channel, u8 extension_chan_offset)
 242 {
 243         const struct iwl_channel_info *ch_info;
 244
 245         ch_info = iwl_get_channel_info(priv, band, channel);
 246         if (!is_channel_valid(ch_info))
 247                 return false;
 248
 249         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 250                 return !(ch_info->ht40_extension_channel &
 251                                         IEEE80211_CHAN_NO_HT40PLUS);
 252         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 253                 return !(ch_info->ht40_extension_channel &
 254                                         IEEE80211_CHAN_NO_HT40MINUS);
 255
 256         return false;
 257 }
 258
 259 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 260                             struct iwl_rxon_context *ctx,
 261                             struct ieee80211_sta_ht_cap *ht_cap)
 262 {
 263         if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
 264                 return false;
 265
 266         /*
 267          * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
 268          * the bit will not set if it is pure 40MHz case
 269          */
 270         if (ht_cap && !ht_cap->ht_supported)
 271                 return false;
 272
 273 #ifdef CONFIG_IWLWIFI_DEBUGFS
 274         if (priv->disable_ht40)
 275                 return false;
 276 #endif
 277
 278         return iwl_is_channel_extension(priv, priv->band,
 279                         le16_to_cpu(ctx->staging.channel),
 280                         ctx->ht.extension_chan_offset);
 281 }
 282
 283 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 284 {
 285         u16 new_val;
 286         u16 beacon_factor;
 287
 288         /*
 289          * If mac80211 hasn't given us a beacon interval, program
 290          * the default into the device (not checking this here
 291          * would cause the adjustment below to return the maximum
 292          * value, which may break PAN.)
 293          */
 294         if (!beacon_val)
 295                 return DEFAULT_BEACON_INTERVAL;
 296
 297         /*
 298          * If the beacon interval we obtained from the peer
 299          * is too large, we'll have to wake up more often
 300          * (and in IBSS case, we'll beacon too much)
 301          *
 302          * For example, if max_beacon_val is 4096, and the
 303          * requested beacon interval is 7000, we'll have to
 304          * use 3500 to be able to wake up on the beacons.
 305          *
 306          * This could badly influence beacon detection stats.
 307          */
 308
 309         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 310         new_val = beacon_val / beacon_factor;
 311
 312         if (!new_val)
 313                 new_val = max_beacon_val;
 314
 315         return new_val;
 316 }
 317
 318 int iwl_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 319 {
 320         u64 tsf;
 321         s32 interval_tm, rem;
 322         struct ieee80211_conf *conf = NULL;
 323         u16 beacon_int;
 324         struct ieee80211_vif *vif = ctx->vif;
 325
 326         conf = ieee80211_get_hw_conf(priv->hw);
 327
 328         lockdep_assert_held(&priv->shrd->mutex);
 329
 330         memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
 331
 332         ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
 333         ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
 334
 335         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
 336
 337         /*
 338          * TODO: For IBSS we need to get atim_window from mac80211,
 339          *       for now just always use 0
 340          */
 341         ctx->timing.atim_window = 0;
 342
 343         if (ctx->ctxid == IWL_RXON_CTX_PAN &&
 344             (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
 345             iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
 346             priv->contexts[IWL_RXON_CTX_BSS].vif &&
 347             priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
 348                 ctx->timing.beacon_interval =
 349                         priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
 350                 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
 351         } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
 352                    iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
 353                    priv->contexts[IWL_RXON_CTX_PAN].vif &&
 354                    priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
 355                    (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
 356                     !ctx->vif->bss_conf.beacon_int)) {
 357                 ctx->timing.beacon_interval =
 358                         priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
 359                 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
 360         } else {
 361                 beacon_int = iwl_adjust_beacon_interval(beacon_int,
 362                         IWL_MAX_UCODE_BEACON_INTERVAL * TIME_UNIT);
 363                 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
 364         }
 365
 366         ctx->beacon_int = beacon_int;
 367
 368         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 369         interval_tm = beacon_int * TIME_UNIT;
 370         rem = do_div(tsf, interval_tm);
 371         ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 372
 373         ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
 374
 375         IWL_DEBUG_ASSOC(priv,
 376                         "beacon interval %d beacon timer %d beacon tim %d\n",
 377                         le16_to_cpu(ctx->timing.beacon_interval),
 378                         le32_to_cpu(ctx->timing.beacon_init_val),
 379                         le16_to_cpu(ctx->timing.atim_window));
 380
 381         return iwl_trans_send_cmd_pdu(trans(priv), ctx->rxon_timing_cmd,
 382                                 CMD_SYNC, sizeof(ctx->timing), &ctx->timing);
 383 }
 384
 385 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 386                            int hw_decrypt)
 387 {
 388         struct iwl_rxon_cmd *rxon = &ctx->staging;
 389
 390         if (hw_decrypt)
 391                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 392         else
 393                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 394
 395 }
 396
 397 /* validate RXON structure is valid */
 398 int iwl_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 399 {
 400         struct iwl_rxon_cmd *rxon = &ctx->staging;
 401         u32 errors = 0;
 402
 403         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 404                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
 405                         IWL_WARN(priv, "check 2.4G: wrong narrow\n");
 406                         errors |= BIT(0);
 407                 }
 408                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
 409                         IWL_WARN(priv, "check 2.4G: wrong radar\n");
 410                         errors |= BIT(1);
 411                 }
 412         } else {
 413                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
 414                         IWL_WARN(priv, "check 5.2G: not short slot!\n");
 415                         errors |= BIT(2);
 416                 }
 417                 if (rxon->flags & RXON_FLG_CCK_MSK) {
 418                         IWL_WARN(priv, "check 5.2G: CCK!\n");
 419                         errors |= BIT(3);
 420                 }
 421         }
 422         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
 423                 IWL_WARN(priv, "mac/bssid mcast!\n");
 424                 errors |= BIT(4);
 425         }
 426
 427         /* make sure basic rates 6Mbps and 1Mbps are supported */
 428         if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
 429             (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
 430                 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
 431                 errors |= BIT(5);
 432         }
 433
 434         if (le16_to_cpu(rxon->assoc_id) > 2007) {
 435                 IWL_WARN(priv, "aid > 2007\n");
 436                 errors |= BIT(6);
 437         }
 438
 439         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 440                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
 441                 IWL_WARN(priv, "CCK and short slot\n");
 442                 errors |= BIT(7);
 443         }
 444
 445         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 446                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
 447                 IWL_WARN(priv, "CCK and auto detect");
 448                 errors |= BIT(8);
 449         }
 450
 451         if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 452                             RXON_FLG_TGG_PROTECT_MSK)) ==
 453                             RXON_FLG_TGG_PROTECT_MSK) {
 454                 IWL_WARN(priv, "TGg but no auto-detect\n");
 455                 errors |= BIT(9);
 456         }
 457
 458         if (rxon->channel == 0) {
 459                 IWL_WARN(priv, "zero channel is invalid\n");
 460                 errors |= BIT(10);
 461         }
 462
 463         WARN(errors, "Invalid RXON (%#x), channel %d",
 464              errors, le16_to_cpu(rxon->channel));
 465
 466         return errors ? -EINVAL : 0;
 467 }
 468
 469 /**
 470  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 471  * @priv: staging_rxon is compared to active_rxon
 472  *
 473  * If the RXON structure is changing enough to require a new tune,
 474  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 475  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 476  */
 477 int iwl_full_rxon_required(struct iwl_priv *priv,
 478                            struct iwl_rxon_context *ctx)
 479 {
 480         const struct iwl_rxon_cmd *staging = &ctx->staging;
 481         const struct iwl_rxon_cmd *active = &ctx->active;
 482
 483 #define CHK(cond)                                                       \
 484         if ((cond)) {                                                   \
 485                 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n");   \
 486                 return 1;                                               \
 487         }
 488
 489 #define CHK_NEQ(c1, c2)                                         \
 490         if ((c1) != (c2)) {                                     \
 491                 IWL_DEBUG_INFO(priv, "need full RXON - "        \
 492                                #c1 " != " #c2 " - %d != %d\n",  \
 493                                (c1), (c2));                     \
 494                 return 1;                                       \
 495         }
 496
 497         /* These items are only settable from the full RXON command */
 498         CHK(!iwl_is_associated_ctx(ctx));
 499         CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
 500         CHK(compare_ether_addr(staging->node_addr, active->node_addr));
 501         CHK(compare_ether_addr(staging->wlap_bssid_addr,
 502                                 active->wlap_bssid_addr));
 503         CHK_NEQ(staging->dev_type, active->dev_type);
 504         CHK_NEQ(staging->channel, active->channel);
 505         CHK_NEQ(staging->air_propagation, active->air_propagation);
 506         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
 507                 active->ofdm_ht_single_stream_basic_rates);
 508         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
 509                 active->ofdm_ht_dual_stream_basic_rates);
 510         CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
 511                 active->ofdm_ht_triple_stream_basic_rates);
 512         CHK_NEQ(staging->assoc_id, active->assoc_id);
 513
 514         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 515          * be updated with the RXON_ASSOC command -- however only some
 516          * flag transitions are allowed using RXON_ASSOC */
 517
 518         /* Check if we are not switching bands */
 519         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
 520                 active->flags & RXON_FLG_BAND_24G_MSK);
 521
 522         /* Check if we are switching association toggle */
 523         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
 524                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
 525
 526 #undef CHK
 527 #undef CHK_NEQ
 528
 529         return 0;
 530 }
 531
 532 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
 533                              struct iwl_ht_config *ht_conf,
 534                              struct iwl_rxon_context *ctx)
 535 {
 536         struct iwl_rxon_cmd *rxon = &ctx->staging;
 537
 538         if (!ctx->ht.enabled) {
 539                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 540                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 541                         RXON_FLG_HT40_PROT_MSK |
 542                         RXON_FLG_HT_PROT_MSK);
 543                 return;
 544         }
 545
 546         /* FIXME: if the definition of ht.protection changed, the "translation"
 547          * will be needed for rxon->flags
 548          */
 549         rxon->flags |= cpu_to_le32(ctx->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
 550
 551         /* Set up channel bandwidth:
 552          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 553         /* clear the HT channel mode before set the mode */
 554         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 555                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 556         if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
 557                 /* pure ht40 */
 558                 if (ctx->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 559                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 560                         /* Note: control channel is opposite of extension channel */
 561                         switch (ctx->ht.extension_chan_offset) {
 562                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 563                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 564                                 break;
 565                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 566                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 567                                 break;
 568                         }
 569                 } else {
 570                         /* Note: control channel is opposite of extension channel */
 571                         switch (ctx->ht.extension_chan_offset) {
 572                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 573                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 574                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 575                                 break;
 576                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 577                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 578                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 579                                 break;
 580                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 581                         default:
 582                                 /* channel location only valid if in Mixed mode */
 583                                 IWL_ERR(priv, "invalid extension channel offset\n");
 584                                 break;
 585                         }
 586                 }
 587         } else {
 588                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 589         }
 590
 591         iwlagn_set_rxon_chain(priv, ctx);
 592
 593         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 594                         "extension channel offset 0x%x\n",
 595                         le32_to_cpu(rxon->flags), ctx->ht.protection,
 596                         ctx->ht.extension_chan_offset);
 597 }
 598
 599 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 600 {
 601         struct iwl_rxon_context *ctx;
 602
 603         for_each_context(priv, ctx)
 604                 _iwl_set_rxon_ht(priv, ht_conf, ctx);
 605 }
 606
 607 /* Return valid, unused, channel for a passive scan to reset the RF */
 608 u8 iwl_get_single_channel_number(struct iwl_priv *priv,
 609                                  enum ieee80211_band band)
 610 {
 611         const struct iwl_channel_info *ch_info;
 612         int i;
 613         u8 channel = 0;
 614         u8 min, max;
 615         struct iwl_rxon_context *ctx;
 616
 617         if (band == IEEE80211_BAND_5GHZ) {
 618                 min = 14;
 619                 max = priv->channel_count;
 620         } else {
 621                 min = 0;
 622                 max = 14;
 623         }
 624
 625         for (i = min; i < max; i++) {
 626                 bool busy = false;
 627
 628                 for_each_context(priv, ctx) {
 629                         busy = priv->channel_info[i].channel ==
 630                                 le16_to_cpu(ctx->staging.channel);
 631                         if (busy)
 632                                 break;
 633                 }
 634
 635                 if (busy)
 636                         continue;
 637
 638                 channel = priv->channel_info[i].channel;
 639                 ch_info = iwl_get_channel_info(priv, band, channel);
 640                 if (is_channel_valid(ch_info))
 641                         break;
 642         }
 643
 644         return channel;
 645 }
 646
 647 /**
 648  * iwl_set_rxon_channel - Set the band and channel values in staging RXON
 649  * @ch: requested channel as a pointer to struct ieee80211_channel
 650
 651  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 652  * in the staging RXON flag structure based on the ch->band
 653  */
 654 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
 655                          struct iwl_rxon_context *ctx)
 656 {
 657         enum ieee80211_band band = ch->band;
 658         u16 channel = ch->hw_value;
 659
 660         if ((le16_to_cpu(ctx->staging.channel) == channel) &&
 661             (priv->band == band))
 662                 return 0;
 663
 664         ctx->staging.channel = cpu_to_le16(channel);
 665         if (band == IEEE80211_BAND_5GHZ)
 666                 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
 667         else
 668                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
 669
 670         priv->band = band;
 671
 672         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 673
 674         return 0;
 675 }
 676
 677 void iwl_set_flags_for_band(struct iwl_priv *priv,
 678                             struct iwl_rxon_context *ctx,
 679                             enum ieee80211_band band,
 680                             struct ieee80211_vif *vif)
 681 {
 682         if (band == IEEE80211_BAND_5GHZ) {
 683                 ctx->staging.flags &=
 684                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 685                       | RXON_FLG_CCK_MSK);
 686                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 687         } else {
 688                 /* Copied from iwl_post_associate() */
 689                 if (vif && vif->bss_conf.use_short_slot)
 690                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 691                 else
 692                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 693
 694                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
 695                 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
 696                 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
 697         }
 698 }
 699
 700 /*
 701  * initialize rxon structure with default values from eeprom
 702  */
 703 void iwl_connection_init_rx_config(struct iwl_priv *priv,
 704                                    struct iwl_rxon_context *ctx)
 705 {
 706         const struct iwl_channel_info *ch_info;
 707
 708         memset(&ctx->staging, 0, sizeof(ctx->staging));
 709
 710         if (!ctx->vif) {
 711                 ctx->staging.dev_type = ctx->unused_devtype;
 712         } else switch (ctx->vif->type) {
 713         case NL80211_IFTYPE_AP:
 714                 ctx->staging.dev_type = ctx->ap_devtype;
 715                 break;
 716
 717         case NL80211_IFTYPE_STATION:
 718                 ctx->staging.dev_type = ctx->station_devtype;
 719                 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
 720                 break;
 721
 722         case NL80211_IFTYPE_ADHOC:
 723                 ctx->staging.dev_type = ctx->ibss_devtype;
 724                 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
 725                 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
 726                                                   RXON_FILTER_ACCEPT_GRP_MSK;
 727                 break;
 728
 729         default:
 730                 IWL_ERR(priv, "Unsupported interface type %d\n",
 731                         ctx->vif->type);
 732                 break;
 733         }
 734
 735 #if 0
 736         /* TODO:  Figure out when short_preamble would be set and cache from
 737          * that */
 738         if (!hw_to_local(priv->hw)->short_preamble)
 739                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
 740         else
 741                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
 742 #endif
 743
 744         ch_info = iwl_get_channel_info(priv, priv->band,
 745                                        le16_to_cpu(ctx->active.channel));
 746
 747         if (!ch_info)
 748                 ch_info = &priv->channel_info[0];
 749
 750         ctx->staging.channel = cpu_to_le16(ch_info->channel);
 751         priv->band = ch_info->band;
 752
 753         iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
 754
 755         ctx->staging.ofdm_basic_rates =
 756             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
 757         ctx->staging.cck_basic_rates =
 758             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
 759
 760         /* clear both MIX and PURE40 mode flag */
 761         ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
 762                                         RXON_FLG_CHANNEL_MODE_PURE_40);
 763         if (ctx->vif)
 764                 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
 765
 766         ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
 767         ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
 768         ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
 769 }
 770
 771 void iwl_set_rate(struct iwl_priv *priv)
 772 {
 773         const struct ieee80211_supported_band *hw = NULL;
 774         struct ieee80211_rate *rate;
 775         struct iwl_rxon_context *ctx;
 776         int i;
 777
 778         hw = iwl_get_hw_mode(priv, priv->band);
 779         if (!hw) {
 780                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
 781                 return;
 782         }
 783
 784         priv->active_rate = 0;
 785
 786         for (i = 0; i < hw->n_bitrates; i++) {
 787                 rate = &(hw->bitrates[i]);
 788                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
 789                         priv->active_rate |= (1 << rate->hw_value);
 790         }
 791
 792         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
 793
 794         for_each_context(priv, ctx) {
 795                 ctx->staging.cck_basic_rates =
 796                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
 797
 798                 ctx->staging.ofdm_basic_rates =
 799                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
 800         }
 801 }
 802
 803 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
 804 {
 805         /*
 806          * MULTI-FIXME
 807          * See iwl_mac_channel_switch.
 808          */
 809         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 810
 811         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 812                 return;
 813
 814         if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING,
 815                                 &priv->shrd->status))
 816                 ieee80211_chswitch_done(ctx->vif, is_success);
 817 }
 818
 819 #ifdef CONFIG_IWLWIFI_DEBUG
 820 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
 821                              enum iwl_rxon_context_id ctxid)
 822 {
 823         struct iwl_rxon_context *ctx = &priv->contexts[ctxid];
 824         struct iwl_rxon_cmd *rxon = &ctx->staging;
 825
 826         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
 827         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
 828         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
 829         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
 830         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
 831                         le32_to_cpu(rxon->filter_flags));
 832         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
 833         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
 834                         rxon->ofdm_basic_rates);
 835         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
 836         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
 837         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
 838         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
 839 }
 840 #endif
 841
 842 static void iwlagn_abort_notification_waits(struct iwl_priv *priv)
 843 {
 844         unsigned long flags;
 845         struct iwl_notification_wait *wait_entry;
 846
 847         spin_lock_irqsave(&priv->notif_wait_lock, flags);
 848         list_for_each_entry(wait_entry, &priv->notif_waits, list)
 849                 wait_entry->aborted = true;
 850         spin_unlock_irqrestore(&priv->notif_wait_lock, flags);
 851
 852         wake_up_all(&priv->notif_waitq);
 853 }
 854
 855 void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
 856 {
 857         unsigned int reload_msec;
 858         unsigned long reload_jiffies;
 859
 860         /* Set the FW error flag -- cleared on iwl_down */
 861         set_bit(STATUS_FW_ERROR, &priv->shrd->status);
 862
 863         /* Cancel currently queued command. */
 864         clear_bit(STATUS_HCMD_ACTIVE, &priv->shrd->status);
 865
 866         iwlagn_abort_notification_waits(priv);
 867
 868         /* Keep the restart process from trying to send host
 869          * commands by clearing the ready bit */
 870         clear_bit(STATUS_READY, &priv->shrd->status);
 871
 872         wake_up_interruptible(&priv->shrd->wait_command_queue);
 873
 874         if (!ondemand) {
 875                 /*
 876                  * If firmware keep reloading, then it indicate something
 877                  * serious wrong and firmware having problem to recover
 878                  * from it. Instead of keep trying which will fill the syslog
 879                  * and hang the system, let's just stop it
 880                  */
 881                 reload_jiffies = jiffies;
 882                 reload_msec = jiffies_to_msecs((long) reload_jiffies -
 883                                         (long) priv->reload_jiffies);
 884                 priv->reload_jiffies = reload_jiffies;
 885                 if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
 886                         priv->reload_count++;
 887                         if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
 888                                 IWL_ERR(priv, "BUG_ON, Stop restarting\n");
 889                                 return;
 890                         }
 891                 } else
 892                         priv->reload_count = 0;
 893         }
 894
 895         if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
 896                 if (iwlagn_mod_params.restart_fw) {
 897                         IWL_DEBUG_FW_ERRORS(priv,
 898                                   "Restarting adapter due to uCode error.\n");
 899                         queue_work(priv->shrd->workqueue, &priv->restart);
 900                 } else
 901                         IWL_DEBUG_FW_ERRORS(priv,
 902                                   "Detected FW error, but not restarting\n");
 903         }
 904 }
 905
 906 static int iwl_apm_stop_master(struct iwl_priv *priv)
 907 {
 908         int ret = 0;
 909
 910         /* stop device's busmaster DMA activity */
 911         iwl_set_bit(bus(priv), CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 912
 913         ret = iwl_poll_bit(bus(priv), CSR_RESET,
 914                         CSR_RESET_REG_FLAG_MASTER_DISABLED,
 915                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 916         if (ret)
 917                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
 918
 919         IWL_DEBUG_INFO(priv, "stop master\n");
 920
 921         return ret;
 922 }
 923
 924 void iwl_apm_stop(struct iwl_priv *priv)
 925 {
 926         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
 927
 928         clear_bit(STATUS_DEVICE_ENABLED, &priv->shrd->status);
 929
 930         /* Stop device's DMA activity */
 931         iwl_apm_stop_master(priv);
 932
 933         /* Reset the entire device */
 934         iwl_set_bit(bus(priv), CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 935
 936         udelay(10);
 937
 938         /*
 939          * Clear "initialization complete" bit to move adapter from
 940          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
 941          */
 942         iwl_clear_bit(bus(priv), CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 943 }
 944
 945
 946 /*
 947  * Start up NIC's basic functionality after it has been reset
 948  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
 949  * NOTE:  This does not load uCode nor start the embedded processor
 950  */
 951 int iwl_apm_init(struct iwl_priv *priv)
 952 {
 953         int ret = 0;
 954         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
 955
 956         /*
 957          * Use "set_bit" below rather than "write", to preserve any hardware
 958          * bits already set by default after reset.
 959          */
 960
 961         /* Disable L0S exit timer (platform NMI Work/Around) */
 962         iwl_set_bit(bus(priv), CSR_GIO_CHICKEN_BITS,
 963                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 964
 965         /*
 966          * Disable L0s without affecting L1;
 967          *  don't wait for ICH L0s (ICH bug W/A)
 968          */
 969         iwl_set_bit(bus(priv), CSR_GIO_CHICKEN_BITS,
 970                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
 971
 972         /* Set FH wait threshold to maximum (HW error during stress W/A) */
 973         iwl_set_bit(bus(priv), CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
 974
 975         /*
 976          * Enable HAP INTA (interrupt from management bus) to
 977          * wake device's PCI Express link L1a -> L0s
 978          */
 979         iwl_set_bit(bus(priv), CSR_HW_IF_CONFIG_REG,
 980                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
 981
 982         bus_apm_config(priv->bus);
 983
 984         /* Configure analog phase-lock-loop before activating to D0A */
 985         if (priv->cfg->base_params->pll_cfg_val)
 986                 iwl_set_bit(bus(priv), CSR_ANA_PLL_CFG,
 987                             priv->cfg->base_params->pll_cfg_val);
 988
 989         /*
 990          * Set "initialization complete" bit to move adapter from
 991          * D0U* --> D0A* (powered-up active) state.
 992          */
 993         iwl_set_bit(bus(priv), CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 994
 995         /*
 996          * Wait for clock stabilization; once stabilized, access to
 997          * device-internal resources is supported, e.g. iwl_write_prph()
 998          * and accesses to uCode SRAM.
 999          */
1000         ret = iwl_poll_bit(bus(priv), CSR_GP_CNTRL,
1001                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1002                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1003         if (ret < 0) {
1004                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1005                 goto out;
1006         }
1007
1008         /*
1009          * Enable DMA clock and wait for it to stabilize.
1010          *
1011          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1012          * do not disable clocks.  This preserves any hardware bits already
1013          * set by default in "CLK_CTRL_REG" after reset.
1014          */
1015         iwl_write_prph(bus(priv), APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
1016         udelay(20);
1017
1018         /* Disable L1-Active */
1019         iwl_set_bits_prph(bus(priv), APMG_PCIDEV_STT_REG,
1020                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1021
1022         set_bit(STATUS_DEVICE_ENABLED, &priv->shrd->status);
1023
1024 out:
1025         return ret;
1026 }
1027
1028
1029 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1030 {
1031         int ret;
1032         s8 prev_tx_power;
1033         bool defer;
1034         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1035
1036         lockdep_assert_held(&priv->shrd->mutex);
1037
1038         if (priv->tx_power_user_lmt == tx_power && !force)
1039                 return 0;
1040
1041         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1042                 IWL_WARN(priv,
1043                          "Requested user TXPOWER %d below lower limit %d.\n",
1044                          tx_power,
1045                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
1046                 return -EINVAL;
1047         }
1048
1049         if (tx_power > priv->tx_power_device_lmt) {
1050                 IWL_WARN(priv,
1051                         "Requested user TXPOWER %d above upper limit %d.\n",
1052                          tx_power, priv->tx_power_device_lmt);
1053                 return -EINVAL;
1054         }
1055
1056         if (!iwl_is_ready_rf(priv->shrd))
1057                 return -EIO;
1058
1059         /* scan complete and commit_rxon use tx_power_next value,
1060          * it always need to be updated for newest request */
1061         priv->tx_power_next = tx_power;
1062
1063         /* do not set tx power when scanning or channel changing */
1064         defer = test_bit(STATUS_SCANNING, &priv->shrd->status) ||
1065                 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
1066         if (defer && !force) {
1067                 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
1068                 return 0;
1069         }
1070
1071         prev_tx_power = priv->tx_power_user_lmt;
1072         priv->tx_power_user_lmt = tx_power;
1073
1074         ret = iwlagn_send_tx_power(priv);
1075
1076         /* if fail to set tx_power, restore the orig. tx power */
1077         if (ret) {
1078                 priv->tx_power_user_lmt = prev_tx_power;
1079                 priv->tx_power_next = prev_tx_power;
1080         }
1081         return ret;
1082 }
1083
1084 void iwl_send_bt_config(struct iwl_priv *priv)
1085 {
1086         struct iwl_bt_cmd bt_cmd = {
1087                 .lead_time = BT_LEAD_TIME_DEF,
1088                 .max_kill = BT_MAX_KILL_DEF,
1089                 .kill_ack_mask = 0,
1090                 .kill_cts_mask = 0,
1091         };
1092
1093         if (!iwlagn_mod_params.bt_coex_active)
1094                 bt_cmd.flags = BT_COEX_DISABLE;
1095         else
1096                 bt_cmd.flags = BT_COEX_ENABLE;
1097
1098         priv->bt_enable_flag = bt_cmd.flags;
1099         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1100                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1101
1102         if (iwl_trans_send_cmd_pdu(trans(priv), REPLY_BT_CONFIG,
1103                              CMD_SYNC, sizeof(struct iwl_bt_cmd), &bt_cmd))
1104                 IWL_ERR(priv, "failed to send BT Coex Config\n");
1105 }
1106
1107 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1108 {
1109         struct iwl_statistics_cmd statistics_cmd = {
1110                 .configuration_flags =
1111                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1112         };
1113
1114         if (flags & CMD_ASYNC)
1115                 return iwl_trans_send_cmd_pdu(trans(priv), REPLY_STATISTICS_CMD,
1116                                               CMD_ASYNC,
1117                                                sizeof(struct iwl_statistics_cmd),
1118                                                &statistics_cmd);
1119         else
1120                 return iwl_trans_send_cmd_pdu(trans(priv), REPLY_STATISTICS_CMD,
1121                                         CMD_SYNC,
1122                                         sizeof(struct iwl_statistics_cmd),
1123                                         &statistics_cmd);
1124 }
1125
1126 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1127                            const struct ieee80211_tx_queue_params *params)
1128 {
1129         struct iwl_priv *priv = hw->priv;
1130         struct iwl_rxon_context *ctx;
1131         unsigned long flags;
1132         int q;
1133
1134         IWL_DEBUG_MAC80211(priv, "enter\n");
1135
1136         if (!iwl_is_ready_rf(priv->shrd)) {
1137                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1138                 return -EIO;
1139         }
1140
1141         if (queue >= AC_NUM) {
1142                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1143                 return 0;
1144         }
1145
1146         q = AC_NUM - 1 - queue;
1147
1148         spin_lock_irqsave(&priv->shrd->lock, flags);
1149
1150         /*
1151          * MULTI-FIXME
1152          * This may need to be done per interface in nl80211/cfg80211/mac80211.
1153          */
1154         for_each_context(priv, ctx) {
1155                 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1156                         cpu_to_le16(params->cw_min);
1157                 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1158                         cpu_to_le16(params->cw_max);
1159                 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1160                 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1161                                 cpu_to_le16((params->txop * 32));
1162
1163                 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1164         }
1165
1166         spin_unlock_irqrestore(&priv->shrd->lock, flags);
1167
1168         IWL_DEBUG_MAC80211(priv, "leave\n");
1169         return 0;
1170 }
1171
1172 int iwl_mac_tx_last_beacon(struct ieee80211_hw *hw)
1173 {
1174         struct iwl_priv *priv = hw->priv;
1175
1176         return priv->ibss_manager == IWL_IBSS_MANAGER;
1177 }
1178
1179 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1180 {
1181         iwl_connection_init_rx_config(priv, ctx);
1182
1183         iwlagn_set_rxon_chain(priv, ctx);
1184
1185         return iwlagn_commit_rxon(priv, ctx);
1186 }
1187
1188 static int iwl_setup_interface(struct iwl_priv *priv,
1189                                struct iwl_rxon_context *ctx)
1190 {
1191         struct ieee80211_vif *vif = ctx->vif;
1192         int err;
1193
1194         lockdep_assert_held(&priv->shrd->mutex);
1195
1196         /*
1197          * This variable will be correct only when there's just
1198          * a single context, but all code using it is for hardware
1199          * that supports only one context.
1200          */
1201         priv->iw_mode = vif->type;
1202
1203         ctx->is_active = true;
1204
1205         err = iwl_set_mode(priv, ctx);
1206         if (err) {
1207                 if (!ctx->always_active)
1208                         ctx->is_active = false;
1209                 return err;
1210         }
1211
1212         if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1213             vif->type == NL80211_IFTYPE_ADHOC) {
1214                 /*
1215                  * pretend to have high BT traffic as long as we
1216                  * are operating in IBSS mode, as this will cause
1217                  * the rate scaling etc. to behave as intended.
1218                  */
1219                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1220         }
1221
1222         return 0;
1223 }
1224
1225 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1226 {
1227         struct iwl_priv *priv = hw->priv;
1228         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1229         struct iwl_rxon_context *tmp, *ctx = NULL;
1230         int err;
1231         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1232
1233         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1234                            viftype, vif->addr);
1235
1236         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1237
1238         mutex_lock(&priv->shrd->mutex);
1239
1240         iwlagn_disable_roc(priv);
1241
1242         if (!iwl_is_ready_rf(priv->shrd)) {
1243                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1244                 err = -EINVAL;
1245                 goto out;
1246         }
1247
1248         for_each_context(priv, tmp) {
1249                 u32 possible_modes =
1250                         tmp->interface_modes | tmp->exclusive_interface_modes;
1251
1252                 if (tmp->vif) {
1253                         /* check if this busy context is exclusive */
1254                         if (tmp->exclusive_interface_modes &
1255                                                 BIT(tmp->vif->type)) {
1256                                 err = -EINVAL;
1257                                 goto out;
1258                         }
1259                         continue;
1260                 }
1261
1262                 if (!(possible_modes & BIT(viftype)))
1263                         continue;
1264
1265                 /* have maybe usable context w/o interface */
1266                 ctx = tmp;
1267                 break;
1268         }
1269
1270         if (!ctx) {
1271                 err = -EOPNOTSUPP;
1272                 goto out;
1273         }
1274
1275         vif_priv->ctx = ctx;
1276         ctx->vif = vif;
1277
1278         err = iwl_setup_interface(priv, ctx);
1279         if (!err)
1280                 goto out;
1281
1282         ctx->vif = NULL;
1283         priv->iw_mode = NL80211_IFTYPE_STATION;
1284  out:
1285         mutex_unlock(&priv->shrd->mutex);
1286
1287         IWL_DEBUG_MAC80211(priv, "leave\n");
1288         return err;
1289 }
1290
1291 static void iwl_teardown_interface(struct iwl_priv *priv,
1292                                    struct ieee80211_vif *vif,
1293                                    bool mode_change)
1294 {
1295         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1296
1297         lockdep_assert_held(&priv->shrd->mutex);
1298
1299         if (priv->scan_vif == vif) {
1300                 iwl_scan_cancel_timeout(priv, 200);
1301                 iwl_force_scan_end(priv);
1302         }
1303
1304         if (!mode_change) {
1305                 iwl_set_mode(priv, ctx);
1306                 if (!ctx->always_active)
1307                         ctx->is_active = false;
1308         }
1309
1310         /*
1311          * When removing the IBSS interface, overwrite the
1312          * BT traffic load with the stored one from the last
1313          * notification, if any. If this is a device that
1314          * doesn't implement this, this has no effect since
1315          * both values are the same and zero.
1316          */
1317         if (vif->type == NL80211_IFTYPE_ADHOC)
1318                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1319 }
1320
1321 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
1322                               struct ieee80211_vif *vif)
1323 {
1324         struct iwl_priv *priv = hw->priv;
1325         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1326
1327         IWL_DEBUG_MAC80211(priv, "enter\n");
1328
1329         mutex_lock(&priv->shrd->mutex);
1330
1331         WARN_ON(ctx->vif != vif);
1332         ctx->vif = NULL;
1333
1334         iwl_teardown_interface(priv, vif, false);
1335
1336         mutex_unlock(&priv->shrd->mutex);
1337
1338         IWL_DEBUG_MAC80211(priv, "leave\n");
1339
1340 }
1341
1342 #ifdef CONFIG_IWLWIFI_DEBUGFS
1343
1344 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
1345
1346 void iwl_reset_traffic_log(struct iwl_priv *priv)
1347 {
1348         priv->tx_traffic_idx = 0;
1349         priv->rx_traffic_idx = 0;
1350         if (priv->tx_traffic)
1351                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1352         if (priv->rx_traffic)
1353                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1354 }
1355
1356 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
1357 {
1358         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1359
1360         if (iwl_get_debug_level(priv->shrd) & IWL_DL_TX) {
1361                 if (!priv->tx_traffic) {
1362                         priv->tx_traffic =
1363                                 kzalloc(traffic_size, GFP_KERNEL);
1364                         if (!priv->tx_traffic)
1365                                 return -ENOMEM;
1366                 }
1367         }
1368         if (iwl_get_debug_level(priv->shrd) & IWL_DL_RX) {
1369                 if (!priv->rx_traffic) {
1370                         priv->rx_traffic =
1371                                 kzalloc(traffic_size, GFP_KERNEL);
1372                         if (!priv->rx_traffic)
1373                                 return -ENOMEM;
1374                 }
1375         }
1376         iwl_reset_traffic_log(priv);
1377         return 0;
1378 }
1379
1380 void iwl_free_traffic_mem(struct iwl_priv *priv)
1381 {
1382         kfree(priv->tx_traffic);
1383         priv->tx_traffic = NULL;
1384
1385         kfree(priv->rx_traffic);
1386         priv->rx_traffic = NULL;
1387 }
1388
1389 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
1390                       u16 length, struct ieee80211_hdr *header)
1391 {
1392         __le16 fc;
1393         u16 len;
1394
1395         if (likely(!(iwl_get_debug_level(priv->shrd) & IWL_DL_TX)))
1396                 return;
1397
1398         if (!priv->tx_traffic)
1399                 return;
1400
1401         fc = header->frame_control;
1402         if (ieee80211_is_data(fc)) {
1403                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1404                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
1405                 memcpy((priv->tx_traffic +
1406                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1407                        header, len);
1408                 priv->tx_traffic_idx =
1409                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1410         }
1411 }
1412
1413 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
1414                       u16 length, struct ieee80211_hdr *header)
1415 {
1416         __le16 fc;
1417         u16 len;
1418
1419         if (likely(!(iwl_get_debug_level(priv->shrd) & IWL_DL_RX)))
1420                 return;
1421
1422         if (!priv->rx_traffic)
1423                 return;
1424
1425         fc = header->frame_control;
1426         if (ieee80211_is_data(fc)) {
1427                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1428                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
1429                 memcpy((priv->rx_traffic +
1430                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1431                        header, len);
1432                 priv->rx_traffic_idx =
1433                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1434         }
1435 }
1436
1437 const char *get_mgmt_string(int cmd)
1438 {
1439         switch (cmd) {
1440                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1441                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1442                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1443                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1444                 IWL_CMD(MANAGEMENT_PROBE_REQ);
1445                 IWL_CMD(MANAGEMENT_PROBE_RESP);
1446                 IWL_CMD(MANAGEMENT_BEACON);
1447                 IWL_CMD(MANAGEMENT_ATIM);
1448                 IWL_CMD(MANAGEMENT_DISASSOC);
1449                 IWL_CMD(MANAGEMENT_AUTH);
1450                 IWL_CMD(MANAGEMENT_DEAUTH);
1451                 IWL_CMD(MANAGEMENT_ACTION);
1452         default:
1453                 return "UNKNOWN";
1454
1455         }
1456 }
1457
1458 const char *get_ctrl_string(int cmd)
1459 {
1460         switch (cmd) {
1461                 IWL_CMD(CONTROL_BACK_REQ);
1462                 IWL_CMD(CONTROL_BACK);
1463                 IWL_CMD(CONTROL_PSPOLL);
1464                 IWL_CMD(CONTROL_RTS);
1465                 IWL_CMD(CONTROL_CTS);
1466                 IWL_CMD(CONTROL_ACK);
1467                 IWL_CMD(CONTROL_CFEND);
1468                 IWL_CMD(CONTROL_CFENDACK);
1469         default:
1470                 return "UNKNOWN";
1471
1472         }
1473 }
1474
1475 void iwl_clear_traffic_stats(struct iwl_priv *priv)
1476 {
1477         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1478         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1479 }
1480
1481 /*
1482  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
1483  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
1484  * Use debugFs to display the rx/rx_statistics
1485  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
1486  * information will be recorded, but DATA pkt still will be recorded
1487  * for the reason of iwl_led.c need to control the led blinking based on
1488  * number of tx and rx data.
1489  *
1490  */
1491 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1492 {
1493         struct traffic_stats    *stats;
1494
1495         if (is_tx)
1496                 stats = &priv->tx_stats;
1497         else
1498                 stats = &priv->rx_stats;
1499
1500         if (ieee80211_is_mgmt(fc)) {
1501                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1502                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1503                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1504                         break;
1505                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1506                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1507                         break;
1508                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1509                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1510                         break;
1511                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1512                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1513                         break;
1514                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1515                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1516                         break;
1517                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1518                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1519                         break;
1520                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1521                         stats->mgmt[MANAGEMENT_BEACON]++;
1522                         break;
1523                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1524                         stats->mgmt[MANAGEMENT_ATIM]++;
1525                         break;
1526                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1527                         stats->mgmt[MANAGEMENT_DISASSOC]++;
1528                         break;
1529                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1530                         stats->mgmt[MANAGEMENT_AUTH]++;
1531                         break;
1532                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1533                         stats->mgmt[MANAGEMENT_DEAUTH]++;
1534                         break;
1535                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1536                         stats->mgmt[MANAGEMENT_ACTION]++;
1537                         break;
1538                 }
1539         } else if (ieee80211_is_ctl(fc)) {
1540                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1541                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1542                         stats->ctrl[CONTROL_BACK_REQ]++;
1543                         break;
1544                 case cpu_to_le16(IEEE80211_STYPE_BACK):
1545                         stats->ctrl[CONTROL_BACK]++;
1546                         break;
1547                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1548                         stats->ctrl[CONTROL_PSPOLL]++;
1549                         break;
1550                 case cpu_to_le16(IEEE80211_STYPE_RTS):
1551                         stats->ctrl[CONTROL_RTS]++;
1552                         break;
1553                 case cpu_to_le16(IEEE80211_STYPE_CTS):
1554                         stats->ctrl[CONTROL_CTS]++;
1555                         break;
1556                 case cpu_to_le16(IEEE80211_STYPE_ACK):
1557                         stats->ctrl[CONTROL_ACK]++;
1558                         break;
1559                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1560                         stats->ctrl[CONTROL_CFEND]++;
1561                         break;
1562                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1563                         stats->ctrl[CONTROL_CFENDACK]++;
1564                         break;
1565                 }
1566         } else {
1567                 /* data */
1568                 stats->data_cnt++;
1569                 stats->data_bytes += len;
1570         }
1571 }
1572 #endif
1573
1574 static void iwl_force_rf_reset(struct iwl_priv *priv)
1575 {
1576         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
1577                 return;
1578
1579         if (!iwl_is_any_associated(priv)) {
1580                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
1581                 return;
1582         }
1583         /*
1584          * There is no easy and better way to force reset the radio,
1585          * the only known method is switching channel which will force to
1586          * reset and tune the radio.
1587          * Use internal short scan (single channel) operation to should
1588          * achieve this objective.
1589          * Driver should reset the radio when number of consecutive missed
1590          * beacon, or any other uCode error condition detected.
1591          */
1592         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
1593         iwl_internal_short_hw_scan(priv);
1594 }
1595
1596
1597 int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
1598 {
1599         struct iwl_force_reset *force_reset;
1600
1601         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
1602                 return -EINVAL;
1603
1604         if (mode >= IWL_MAX_FORCE_RESET) {
1605                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
1606                 return -EINVAL;
1607         }
1608         force_reset = &priv->force_reset[mode];
1609         force_reset->reset_request_count++;
1610         if (!external) {
1611                 if (force_reset->last_force_reset_jiffies &&
1612                     time_after(force_reset->last_force_reset_jiffies +
1613                     force_reset->reset_duration, jiffies)) {
1614                         IWL_DEBUG_INFO(priv, "force reset rejected\n");
1615                         force_reset->reset_reject_count++;
1616                         return -EAGAIN;
1617                 }
1618         }
1619         force_reset->reset_success_count++;
1620         force_reset->last_force_reset_jiffies = jiffies;
1621         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
1622         switch (mode) {
1623         case IWL_RF_RESET:
1624                 iwl_force_rf_reset(priv);
1625                 break;
1626         case IWL_FW_RESET:
1627                 /*
1628                  * if the request is from external(ex: debugfs),
1629                  * then always perform the request in regardless the module
1630                  * parameter setting
1631                  * if the request is from internal (uCode error or driver
1632                  * detect failure), then fw_restart module parameter
1633                  * need to be check before performing firmware reload
1634                  */
1635                 if (!external && !iwlagn_mod_params.restart_fw) {
1636                         IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1637                                        "module parameter setting\n");
1638                         break;
1639                 }
1640                 IWL_ERR(priv, "On demand firmware reload\n");
1641                 iwlagn_fw_error(priv, true);
1642                 break;
1643         }
1644         return 0;
1645 }
1646
1647 int iwl_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1648                              enum nl80211_iftype newtype, bool newp2p)
1649 {
1650         struct iwl_priv *priv = hw->priv;
1651         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1652         struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1653         struct iwl_rxon_context *tmp;
1654         enum nl80211_iftype newviftype = newtype;
1655         u32 interface_modes;
1656         int err;
1657
1658         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1659
1660         mutex_lock(&priv->shrd->mutex);
1661
1662         if (!ctx->vif || !iwl_is_ready_rf(priv->shrd)) {
1663                 /*
1664                  * Huh? But wait ... this can maybe happen when
1665                  * we're in the middle of a firmware restart!
1666                  */
1667                 err = -EBUSY;
1668                 goto out;
1669         }
1670
1671         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1672
1673         if (!(interface_modes & BIT(newtype))) {
1674                 err = -EBUSY;
1675                 goto out;
1676         }
1677
1678         /*
1679          * Refuse a change that should be done by moving from the PAN
1680          * context to the BSS context instead, if the BSS context is
1681          * available and can support the new interface type.
1682          */
1683         if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1684             (bss_ctx->interface_modes & BIT(newtype) ||
1685              bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1686                 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1687                 err = -EBUSY;
1688                 goto out;
1689         }
1690
1691         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1692                 for_each_context(priv, tmp) {
1693                         if (ctx == tmp)
1694                                 continue;
1695
1696                         if (!tmp->vif)
1697                                 continue;
1698
1699                         /*
1700                          * The current mode switch would be exclusive, but
1701                          * another context is active ... refuse the switch.
1702                          */
1703                         err = -EBUSY;
1704                         goto out;
1705                 }
1706         }
1707
1708         /* success */
1709         iwl_teardown_interface(priv, vif, true);
1710         vif->type = newviftype;
1711         vif->p2p = newp2p;
1712         err = iwl_setup_interface(priv, ctx);
1713         WARN_ON(err);
1714         /*
1715          * We've switched internally, but submitting to the
1716          * device may have failed for some reason. Mask this
1717          * error, because otherwise mac80211 will not switch
1718          * (and set the interface type back) and we'll be
1719          * out of sync with it.
1720          */
1721         err = 0;
1722
1723  out:
1724         mutex_unlock(&priv->shrd->mutex);
1725         return err;
1726 }
1727
1728 static inline int iwl_check_stuck_queue(struct iwl_priv *priv, int txq)
1729 {
1730         if (iwl_trans_check_stuck_queue(trans(priv), txq)) {
1731                 int ret = iwl_force_reset(priv, IWL_FW_RESET, false);
1732                 return (ret == -EAGAIN) ? 0 : 1;
1733         }
1734         return 0;
1735 }
1736
1737 /*
1738  * Making watchdog tick be a quarter of timeout assure we will
1739  * discover the queue hung between timeout and 1.25*timeout
1740  */
1741 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1742
1743 /*
1744  * Watchdog timer callback, we check each tx queue for stuck, if if hung
1745  * we reset the firmware. If everything is fine just rearm the timer.
1746  */
1747 void iwl_bg_watchdog(unsigned long data)
1748 {
1749         struct iwl_priv *priv = (struct iwl_priv *)data;
1750         int cnt;
1751         unsigned long timeout;
1752
1753         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
1754                 return;
1755
1756         timeout = priv->cfg->base_params->wd_timeout;
1757         if (timeout == 0)
1758                 return;
1759
1760         /* monitor and check for stuck cmd queue */
1761         if (iwl_check_stuck_queue(priv, priv->shrd->cmd_queue))
1762                 return;
1763
1764         /* monitor and check for other stuck queues */
1765         if (iwl_is_any_associated(priv)) {
1766                 for (cnt = 0; cnt < hw_params(priv).max_txq_num; cnt++) {
1767                         /* skip as we already checked the command queue */
1768                         if (cnt == priv->shrd->cmd_queue)
1769                                 continue;
1770                         if (iwl_check_stuck_queue(priv, cnt))
1771                                 return;
1772                 }
1773         }
1774
1775         mod_timer(&priv->watchdog, jiffies +
1776                   msecs_to_jiffies(IWL_WD_TICK(timeout)));
1777 }
1778
1779 void iwl_setup_watchdog(struct iwl_priv *priv)
1780 {
1781         unsigned int timeout = priv->cfg->base_params->wd_timeout;
1782
1783         if (timeout && !iwlagn_mod_params.wd_disable)
1784                 mod_timer(&priv->watchdog,
1785                           jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout)));
1786         else
1787                 del_timer(&priv->watchdog);
1788 }
1789
1790 /*
1791  * extended beacon time format
1792  * time in usec will be changed into a 32-bit value in extended:internal format
1793  * the extended part is the beacon counts
1794  * the internal part is the time in usec within one beacon interval
1795  */
1796 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
1797 {
1798         u32 quot;
1799         u32 rem;
1800         u32 interval = beacon_interval * TIME_UNIT;
1801
1802         if (!interval || !usec)
1803                 return 0;
1804
1805         quot = (usec / interval) &
1806                 (iwl_beacon_time_mask_high(priv,
1807                 hw_params(priv).beacon_time_tsf_bits) >>
1808                 hw_params(priv).beacon_time_tsf_bits);
1809         rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
1810                                    hw_params(priv).beacon_time_tsf_bits);
1811
1812         return (quot << hw_params(priv).beacon_time_tsf_bits) + rem;
1813 }
1814
1815 /* base is usually what we get from ucode with each received frame,
1816  * the same as HW timer counter counting down
1817  */
1818 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
1819                            u32 addon, u32 beacon_interval)
1820 {
1821         u32 base_low = base & iwl_beacon_time_mask_low(priv,
1822                                 hw_params(priv).beacon_time_tsf_bits);
1823         u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
1824                                 hw_params(priv).beacon_time_tsf_bits);
1825         u32 interval = beacon_interval * TIME_UNIT;
1826         u32 res = (base & iwl_beacon_time_mask_high(priv,
1827                                 hw_params(priv).beacon_time_tsf_bits)) +
1828                                 (addon & iwl_beacon_time_mask_high(priv,
1829                                 hw_params(priv).beacon_time_tsf_bits));
1830
1831         if (base_low > addon_low)
1832                 res += base_low - addon_low;
1833         else if (base_low < addon_low) {
1834                 res += interval + base_low - addon_low;
1835                 res += (1 << hw_params(priv).beacon_time_tsf_bits);
1836         } else
1837                 res += (1 << hw_params(priv).beacon_time_tsf_bits);
1838
1839         return cpu_to_le32(res);
1840 }
1841
1842 void iwl_start_tx_ba_trans_ready(struct iwl_priv *priv,
1843                                  enum iwl_rxon_context_id ctx,
1844                                  u8 sta_id, u8 tid)
1845 {
1846         struct ieee80211_vif *vif;
1847         u8 *addr = priv->stations[sta_id].sta.sta.addr;
1848
1849         if (ctx == NUM_IWL_RXON_CTX)
1850                 ctx = priv->stations[sta_id].ctxid;
1851         vif = priv->contexts[ctx].vif;
1852
1853         ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
1854 }
1855
1856 void iwl_stop_tx_ba_trans_ready(struct iwl_priv *priv,
1857                                 enum iwl_rxon_context_id ctx,
1858                                 u8 sta_id, u8 tid)
1859 {
1860         struct ieee80211_vif *vif;
1861         u8 *addr = priv->stations[sta_id].sta.sta.addr;
1862
1863         if (ctx == NUM_IWL_RXON_CTX)
1864                 ctx = priv->stations[sta_id].ctxid;
1865         vif = priv->contexts[ctx].vif;
1866
1867         ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
1868 }
1869
1870 void iwl_set_hw_rfkill_state(struct iwl_priv *priv, bool state)
1871 {
1872         wiphy_rfkill_set_hw_state(priv->hw->wiphy, state);
1873 }
1874
1875 void iwl_nic_config(struct iwl_priv *priv)
1876 {
1877         priv->cfg->lib->nic_config(priv);
1878
1879 }
1880
1881 void iwl_free_skb(struct iwl_priv *priv, struct sk_buff *skb)
1882 {
1883         struct ieee80211_tx_info *info;
1884
1885         info = IEEE80211_SKB_CB(skb);
1886         kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
1887         dev_kfree_skb_any(skb);
1888 }
1889
1890 void iwl_stop_sw_queue(struct iwl_priv *priv, u8 ac)
1891 {
1892         ieee80211_stop_queue(priv->hw, ac);
1893 }
1894
1895 void iwl_wake_sw_queue(struct iwl_priv *priv, u8 ac)
1896 {
1897         ieee80211_wake_queue(priv->hw, ac);
1898 }