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

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2012 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-debug.h"
  38 #include "iwl-core.h"
  39 #include "iwl-io.h"
  40 #include "iwl-power.h"
  41 #include "iwl-shared.h"
  42 #include "iwl-agn.h"
  43 #include "iwl-trans.h"
  44
  45 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
  46
  47 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
  48 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
  49 static void iwl_init_ht_hw_capab(const struct iwl_priv *priv,
  50                               struct ieee80211_sta_ht_cap *ht_info,
  51                               enum ieee80211_band band)
  52 {
  53         u16 max_bit_rate = 0;
  54         u8 rx_chains_num = hw_params(priv).rx_chains_num;
  55         u8 tx_chains_num = hw_params(priv).tx_chains_num;
  56
  57         ht_info->cap = 0;
  58         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
  59
  60         ht_info->ht_supported = true;
  61
  62         if (cfg(priv)->ht_params &&
  63             cfg(priv)->ht_params->ht_greenfield_support)
  64                 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
  65         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
  66         max_bit_rate = MAX_BIT_RATE_20_MHZ;
  67         if (hw_params(priv).ht40_channel & BIT(band)) {
  68                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
  69                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
  70                 ht_info->mcs.rx_mask[4] = 0x01;
  71                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
  72         }
  73
  74         if (iwlagn_mod_params.amsdu_size_8K)
  75                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
  76
  77         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
  78         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
  79
  80         ht_info->mcs.rx_mask[0] = 0xFF;
  81         if (rx_chains_num >= 2)
  82                 ht_info->mcs.rx_mask[1] = 0xFF;
  83         if (rx_chains_num >= 3)
  84                 ht_info->mcs.rx_mask[2] = 0xFF;
  85
  86         /* Highest supported Rx data rate */
  87         max_bit_rate *= rx_chains_num;
  88         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
  89         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
  90
  91         /* Tx MCS capabilities */
  92         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
  93         if (tx_chains_num != rx_chains_num) {
  94                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
  95                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
  96                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
  97         }
  98 }
  99
 100 /**
 101  * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
 102  */
 103 int iwl_init_geos(struct iwl_priv *priv)
 104 {
 105         struct iwl_channel_info *ch;
 106         struct ieee80211_supported_band *sband;
 107         struct ieee80211_channel *channels;
 108         struct ieee80211_channel *geo_ch;
 109         struct ieee80211_rate *rates;
 110         int i = 0;
 111         s8 max_tx_power = IWLAGN_TX_POWER_TARGET_POWER_MIN;
 112
 113         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 114             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 115                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 116                 set_bit(STATUS_GEO_CONFIGURED, &priv->shrd->status);
 117                 return 0;
 118         }
 119
 120         channels = kcalloc(priv->channel_count,
 121                            sizeof(struct ieee80211_channel), GFP_KERNEL);
 122         if (!channels)
 123                 return -ENOMEM;
 124
 125         rates = kcalloc(IWL_RATE_COUNT_LEGACY, sizeof(struct ieee80211_rate),
 126                         GFP_KERNEL);
 127         if (!rates) {
 128                 kfree(channels);
 129                 return -ENOMEM;
 130         }
 131
 132         /* 5.2GHz channels start after the 2.4GHz channels */
 133         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 134         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 135         /* just OFDM */
 136         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 137         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
 138
 139         if (hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE)
 140                 iwl_init_ht_hw_capab(priv, &sband->ht_cap,
 141                                          IEEE80211_BAND_5GHZ);
 142
 143         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 144         sband->channels = channels;
 145         /* OFDM & CCK */
 146         sband->bitrates = rates;
 147         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
 148
 149         if (hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE)
 150                 iwl_init_ht_hw_capab(priv, &sband->ht_cap,
 151                                          IEEE80211_BAND_2GHZ);
 152
 153         priv->ieee_channels = channels;
 154         priv->ieee_rates = rates;
 155
 156         for (i = 0;  i < priv->channel_count; i++) {
 157                 ch = &priv->channel_info[i];
 158
 159                 /* FIXME: might be removed if scan is OK */
 160                 if (!is_channel_valid(ch))
 161                         continue;
 162
 163                 sband =  &priv->bands[ch->band];
 164
 165                 geo_ch = &sband->channels[sband->n_channels++];
 166
 167                 geo_ch->center_freq =
 168                         ieee80211_channel_to_frequency(ch->channel, ch->band);
 169                 geo_ch->max_power = ch->max_power_avg;
 170                 geo_ch->max_antenna_gain = 0xff;
 171                 geo_ch->hw_value = ch->channel;
 172
 173                 if (is_channel_valid(ch)) {
 174                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 175                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 176
 177                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 178                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 179
 180                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 181                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 182
 183                         geo_ch->flags |= ch->ht40_extension_channel;
 184
 185                         if (ch->max_power_avg > max_tx_power)
 186                                 max_tx_power = ch->max_power_avg;
 187                 } else {
 188                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 189                 }
 190
 191                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 192                                 ch->channel, geo_ch->center_freq,
 193                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 194                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 195                                 "restricted" : "valid",
 196                                  geo_ch->flags);
 197         }
 198
 199         priv->tx_power_device_lmt = max_tx_power;
 200         priv->tx_power_user_lmt = max_tx_power;
 201         priv->tx_power_next = max_tx_power;
 202
 203         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 204              hw_params(priv).sku & EEPROM_SKU_CAP_BAND_52GHZ) {
 205                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 206                         "Please send your %s to maintainer.\n",
 207                         trans(priv)->hw_id_str);
 208                 hw_params(priv).sku &= ~EEPROM_SKU_CAP_BAND_52GHZ;
 209         }
 210
 211         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 212                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 213                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 214
 215         set_bit(STATUS_GEO_CONFIGURED, &priv->shrd->status);
 216
 217         return 0;
 218 }
 219
 220 /*
 221  * iwl_free_geos - undo allocations in iwl_init_geos
 222  */
 223 void iwl_free_geos(struct iwl_priv *priv)
 224 {
 225         kfree(priv->ieee_channels);
 226         kfree(priv->ieee_rates);
 227         clear_bit(STATUS_GEO_CONFIGURED, &priv->shrd->status);
 228 }
 229
 230 static bool iwl_is_channel_extension(struct iwl_priv *priv,
 231                                      enum ieee80211_band band,
 232                                      u16 channel, u8 extension_chan_offset)
 233 {
 234         const struct iwl_channel_info *ch_info;
 235
 236         ch_info = iwl_get_channel_info(priv, band, channel);
 237         if (!is_channel_valid(ch_info))
 238                 return false;
 239
 240         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 241                 return !(ch_info->ht40_extension_channel &
 242                                         IEEE80211_CHAN_NO_HT40PLUS);
 243         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 244                 return !(ch_info->ht40_extension_channel &
 245                                         IEEE80211_CHAN_NO_HT40MINUS);
 246
 247         return false;
 248 }
 249
 250 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 251                             struct iwl_rxon_context *ctx,
 252                             struct ieee80211_sta_ht_cap *ht_cap)
 253 {
 254         if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
 255                 return false;
 256
 257         /*
 258          * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
 259          * the bit will not set if it is pure 40MHz case
 260          */
 261         if (ht_cap && !ht_cap->ht_supported)
 262                 return false;
 263
 264 #ifdef CONFIG_IWLWIFI_DEBUGFS
 265         if (priv->disable_ht40)
 266                 return false;
 267 #endif
 268
 269         return iwl_is_channel_extension(priv, priv->band,
 270                         le16_to_cpu(ctx->staging.channel),
 271                         ctx->ht.extension_chan_offset);
 272 }
 273
 274 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 275 {
 276         u16 new_val;
 277         u16 beacon_factor;
 278
 279         /*
 280          * If mac80211 hasn't given us a beacon interval, program
 281          * the default into the device (not checking this here
 282          * would cause the adjustment below to return the maximum
 283          * value, which may break PAN.)
 284          */
 285         if (!beacon_val)
 286                 return DEFAULT_BEACON_INTERVAL;
 287
 288         /*
 289          * If the beacon interval we obtained from the peer
 290          * is too large, we'll have to wake up more often
 291          * (and in IBSS case, we'll beacon too much)
 292          *
 293          * For example, if max_beacon_val is 4096, and the
 294          * requested beacon interval is 7000, we'll have to
 295          * use 3500 to be able to wake up on the beacons.
 296          *
 297          * This could badly influence beacon detection stats.
 298          */
 299
 300         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 301         new_val = beacon_val / beacon_factor;
 302
 303         if (!new_val)
 304                 new_val = max_beacon_val;
 305
 306         return new_val;
 307 }
 308
 309 int iwl_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 310 {
 311         u64 tsf;
 312         s32 interval_tm, rem;
 313         struct ieee80211_conf *conf = NULL;
 314         u16 beacon_int;
 315         struct ieee80211_vif *vif = ctx->vif;
 316
 317         conf = &priv->hw->conf;
 318
 319         lockdep_assert_held(&priv->mutex);
 320
 321         memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
 322
 323         ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
 324         ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
 325
 326         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
 327
 328         /*
 329          * TODO: For IBSS we need to get atim_window from mac80211,
 330          *       for now just always use 0
 331          */
 332         ctx->timing.atim_window = 0;
 333
 334         if (ctx->ctxid == IWL_RXON_CTX_PAN &&
 335             (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
 336             iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
 337             priv->contexts[IWL_RXON_CTX_BSS].vif &&
 338             priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
 339                 ctx->timing.beacon_interval =
 340                         priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
 341                 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
 342         } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
 343                    iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
 344                    priv->contexts[IWL_RXON_CTX_PAN].vif &&
 345                    priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
 346                    (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
 347                     !ctx->vif->bss_conf.beacon_int)) {
 348                 ctx->timing.beacon_interval =
 349                         priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
 350                 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
 351         } else {
 352                 beacon_int = iwl_adjust_beacon_interval(beacon_int,
 353                         IWL_MAX_UCODE_BEACON_INTERVAL * TIME_UNIT);
 354                 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
 355         }
 356
 357         ctx->beacon_int = beacon_int;
 358
 359         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 360         interval_tm = beacon_int * TIME_UNIT;
 361         rem = do_div(tsf, interval_tm);
 362         ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 363
 364         ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
 365
 366         IWL_DEBUG_ASSOC(priv,
 367                         "beacon interval %d beacon timer %d beacon tim %d\n",
 368                         le16_to_cpu(ctx->timing.beacon_interval),
 369                         le32_to_cpu(ctx->timing.beacon_init_val),
 370                         le16_to_cpu(ctx->timing.atim_window));
 371
 372         return iwl_dvm_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
 373                                 CMD_SYNC, sizeof(ctx->timing), &ctx->timing);
 374 }
 375
 376 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 377                            int hw_decrypt)
 378 {
 379         struct iwl_rxon_cmd *rxon = &ctx->staging;
 380
 381         if (hw_decrypt)
 382                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 383         else
 384                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 385
 386 }
 387
 388 /* validate RXON structure is valid */
 389 int iwl_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 390 {
 391         struct iwl_rxon_cmd *rxon = &ctx->staging;
 392         u32 errors = 0;
 393
 394         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 395                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
 396                         IWL_WARN(priv, "check 2.4G: wrong narrow\n");
 397                         errors |= BIT(0);
 398                 }
 399                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
 400                         IWL_WARN(priv, "check 2.4G: wrong radar\n");
 401                         errors |= BIT(1);
 402                 }
 403         } else {
 404                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
 405                         IWL_WARN(priv, "check 5.2G: not short slot!\n");
 406                         errors |= BIT(2);
 407                 }
 408                 if (rxon->flags & RXON_FLG_CCK_MSK) {
 409                         IWL_WARN(priv, "check 5.2G: CCK!\n");
 410                         errors |= BIT(3);
 411                 }
 412         }
 413         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
 414                 IWL_WARN(priv, "mac/bssid mcast!\n");
 415                 errors |= BIT(4);
 416         }
 417
 418         /* make sure basic rates 6Mbps and 1Mbps are supported */
 419         if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
 420             (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
 421                 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
 422                 errors |= BIT(5);
 423         }
 424
 425         if (le16_to_cpu(rxon->assoc_id) > 2007) {
 426                 IWL_WARN(priv, "aid > 2007\n");
 427                 errors |= BIT(6);
 428         }
 429
 430         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 431                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
 432                 IWL_WARN(priv, "CCK and short slot\n");
 433                 errors |= BIT(7);
 434         }
 435
 436         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 437                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
 438                 IWL_WARN(priv, "CCK and auto detect");
 439                 errors |= BIT(8);
 440         }
 441
 442         if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 443                             RXON_FLG_TGG_PROTECT_MSK)) ==
 444                             RXON_FLG_TGG_PROTECT_MSK) {
 445                 IWL_WARN(priv, "TGg but no auto-detect\n");
 446                 errors |= BIT(9);
 447         }
 448
 449         if (rxon->channel == 0) {
 450                 IWL_WARN(priv, "zero channel is invalid\n");
 451                 errors |= BIT(10);
 452         }
 453
 454         WARN(errors, "Invalid RXON (%#x), channel %d",
 455              errors, le16_to_cpu(rxon->channel));
 456
 457         return errors ? -EINVAL : 0;
 458 }
 459
 460 /**
 461  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 462  * @priv: staging_rxon is compared to active_rxon
 463  *
 464  * If the RXON structure is changing enough to require a new tune,
 465  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 466  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 467  */
 468 int iwl_full_rxon_required(struct iwl_priv *priv,
 469                            struct iwl_rxon_context *ctx)
 470 {
 471         const struct iwl_rxon_cmd *staging = &ctx->staging;
 472         const struct iwl_rxon_cmd *active = &ctx->active;
 473
 474 #define CHK(cond)                                                       \
 475         if ((cond)) {                                                   \
 476                 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n");   \
 477                 return 1;                                               \
 478         }
 479
 480 #define CHK_NEQ(c1, c2)                                         \
 481         if ((c1) != (c2)) {                                     \
 482                 IWL_DEBUG_INFO(priv, "need full RXON - "        \
 483                                #c1 " != " #c2 " - %d != %d\n",  \
 484                                (c1), (c2));                     \
 485                 return 1;                                       \
 486         }
 487
 488         /* These items are only settable from the full RXON command */
 489         CHK(!iwl_is_associated_ctx(ctx));
 490         CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
 491         CHK(compare_ether_addr(staging->node_addr, active->node_addr));
 492         CHK(compare_ether_addr(staging->wlap_bssid_addr,
 493                                 active->wlap_bssid_addr));
 494         CHK_NEQ(staging->dev_type, active->dev_type);
 495         CHK_NEQ(staging->channel, active->channel);
 496         CHK_NEQ(staging->air_propagation, active->air_propagation);
 497         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
 498                 active->ofdm_ht_single_stream_basic_rates);
 499         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
 500                 active->ofdm_ht_dual_stream_basic_rates);
 501         CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
 502                 active->ofdm_ht_triple_stream_basic_rates);
 503         CHK_NEQ(staging->assoc_id, active->assoc_id);
 504
 505         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 506          * be updated with the RXON_ASSOC command -- however only some
 507          * flag transitions are allowed using RXON_ASSOC */
 508
 509         /* Check if we are not switching bands */
 510         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
 511                 active->flags & RXON_FLG_BAND_24G_MSK);
 512
 513         /* Check if we are switching association toggle */
 514         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
 515                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
 516
 517 #undef CHK
 518 #undef CHK_NEQ
 519
 520         return 0;
 521 }
 522
 523 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
 524                              struct iwl_ht_config *ht_conf,
 525                              struct iwl_rxon_context *ctx)
 526 {
 527         struct iwl_rxon_cmd *rxon = &ctx->staging;
 528
 529         if (!ctx->ht.enabled) {
 530                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 531                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 532                         RXON_FLG_HT40_PROT_MSK |
 533                         RXON_FLG_HT_PROT_MSK);
 534                 return;
 535         }
 536
 537         /* FIXME: if the definition of ht.protection changed, the "translation"
 538          * will be needed for rxon->flags
 539          */
 540         rxon->flags |= cpu_to_le32(ctx->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
 541
 542         /* Set up channel bandwidth:
 543          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 544         /* clear the HT channel mode before set the mode */
 545         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 546                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 547         if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
 548                 /* pure ht40 */
 549                 if (ctx->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 550                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 551                         /* Note: control channel is opposite of extension channel */
 552                         switch (ctx->ht.extension_chan_offset) {
 553                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 554                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 555                                 break;
 556                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 557                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 558                                 break;
 559                         }
 560                 } else {
 561                         /* Note: control channel is opposite of extension channel */
 562                         switch (ctx->ht.extension_chan_offset) {
 563                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 564                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 565                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 566                                 break;
 567                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 568                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 569                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 570                                 break;
 571                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 572                         default:
 573                                 /* channel location only valid if in Mixed mode */
 574                                 IWL_ERR(priv, "invalid extension channel offset\n");
 575                                 break;
 576                         }
 577                 }
 578         } else {
 579                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 580         }
 581
 582         iwlagn_set_rxon_chain(priv, ctx);
 583
 584         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 585                         "extension channel offset 0x%x\n",
 586                         le32_to_cpu(rxon->flags), ctx->ht.protection,
 587                         ctx->ht.extension_chan_offset);
 588 }
 589
 590 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 591 {
 592         struct iwl_rxon_context *ctx;
 593
 594         for_each_context(priv, ctx)
 595                 _iwl_set_rxon_ht(priv, ht_conf, ctx);
 596 }
 597
 598 /* Return valid, unused, channel for a passive scan to reset the RF */
 599 u8 iwl_get_single_channel_number(struct iwl_priv *priv,
 600                                  enum ieee80211_band band)
 601 {
 602         const struct iwl_channel_info *ch_info;
 603         int i;
 604         u8 channel = 0;
 605         u8 min, max;
 606         struct iwl_rxon_context *ctx;
 607
 608         if (band == IEEE80211_BAND_5GHZ) {
 609                 min = 14;
 610                 max = priv->channel_count;
 611         } else {
 612                 min = 0;
 613                 max = 14;
 614         }
 615
 616         for (i = min; i < max; i++) {
 617                 bool busy = false;
 618
 619                 for_each_context(priv, ctx) {
 620                         busy = priv->channel_info[i].channel ==
 621                                 le16_to_cpu(ctx->staging.channel);
 622                         if (busy)
 623                                 break;
 624                 }
 625
 626                 if (busy)
 627                         continue;
 628
 629                 channel = priv->channel_info[i].channel;
 630                 ch_info = iwl_get_channel_info(priv, band, channel);
 631                 if (is_channel_valid(ch_info))
 632                         break;
 633         }
 634
 635         return channel;
 636 }
 637
 638 /**
 639  * iwl_set_rxon_channel - Set the band and channel values in staging RXON
 640  * @ch: requested channel as a pointer to struct ieee80211_channel
 641
 642  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 643  * in the staging RXON flag structure based on the ch->band
 644  */
 645 void iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
 646                          struct iwl_rxon_context *ctx)
 647 {
 648         enum ieee80211_band band = ch->band;
 649         u16 channel = ch->hw_value;
 650
 651         if ((le16_to_cpu(ctx->staging.channel) == channel) &&
 652             (priv->band == band))
 653                 return;
 654
 655         ctx->staging.channel = cpu_to_le16(channel);
 656         if (band == IEEE80211_BAND_5GHZ)
 657                 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
 658         else
 659                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
 660
 661         priv->band = band;
 662
 663         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 664
 665 }
 666
 667 void iwl_set_flags_for_band(struct iwl_priv *priv,
 668                             struct iwl_rxon_context *ctx,
 669                             enum ieee80211_band band,
 670                             struct ieee80211_vif *vif)
 671 {
 672         if (band == IEEE80211_BAND_5GHZ) {
 673                 ctx->staging.flags &=
 674                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 675                       | RXON_FLG_CCK_MSK);
 676                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 677         } else {
 678                 /* Copied from iwl_post_associate() */
 679                 if (vif && vif->bss_conf.use_short_slot)
 680                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 681                 else
 682                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 683
 684                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
 685                 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
 686                 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
 687         }
 688 }
 689
 690 /*
 691  * initialize rxon structure with default values from eeprom
 692  */
 693 void iwl_connection_init_rx_config(struct iwl_priv *priv,
 694                                    struct iwl_rxon_context *ctx)
 695 {
 696         const struct iwl_channel_info *ch_info;
 697
 698         memset(&ctx->staging, 0, sizeof(ctx->staging));
 699
 700         if (!ctx->vif) {
 701                 ctx->staging.dev_type = ctx->unused_devtype;
 702         } else switch (ctx->vif->type) {
 703         case NL80211_IFTYPE_AP:
 704                 ctx->staging.dev_type = ctx->ap_devtype;
 705                 break;
 706
 707         case NL80211_IFTYPE_STATION:
 708                 ctx->staging.dev_type = ctx->station_devtype;
 709                 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
 710                 break;
 711
 712         case NL80211_IFTYPE_ADHOC:
 713                 ctx->staging.dev_type = ctx->ibss_devtype;
 714                 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
 715                 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
 716                                                   RXON_FILTER_ACCEPT_GRP_MSK;
 717                 break;
 718
 719         default:
 720                 IWL_ERR(priv, "Unsupported interface type %d\n",
 721                         ctx->vif->type);
 722                 break;
 723         }
 724
 725 #if 0
 726         /* TODO:  Figure out when short_preamble would be set and cache from
 727          * that */
 728         if (!hw_to_local(priv->hw)->short_preamble)
 729                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
 730         else
 731                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
 732 #endif
 733
 734         ch_info = iwl_get_channel_info(priv, priv->band,
 735                                        le16_to_cpu(ctx->active.channel));
 736
 737         if (!ch_info)
 738                 ch_info = &priv->channel_info[0];
 739
 740         ctx->staging.channel = cpu_to_le16(ch_info->channel);
 741         priv->band = ch_info->band;
 742
 743         iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
 744
 745         ctx->staging.ofdm_basic_rates =
 746             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
 747         ctx->staging.cck_basic_rates =
 748             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
 749
 750         /* clear both MIX and PURE40 mode flag */
 751         ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
 752                                         RXON_FLG_CHANNEL_MODE_PURE_40);
 753         if (ctx->vif)
 754                 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
 755
 756         ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
 757         ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
 758         ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
 759 }
 760
 761 void iwl_set_rate(struct iwl_priv *priv)
 762 {
 763         const struct ieee80211_supported_band *hw = NULL;
 764         struct ieee80211_rate *rate;
 765         struct iwl_rxon_context *ctx;
 766         int i;
 767
 768         hw = iwl_get_hw_mode(priv, priv->band);
 769         if (!hw) {
 770                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
 771                 return;
 772         }
 773
 774         priv->active_rate = 0;
 775
 776         for (i = 0; i < hw->n_bitrates; i++) {
 777                 rate = &(hw->bitrates[i]);
 778                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
 779                         priv->active_rate |= (1 << rate->hw_value);
 780         }
 781
 782         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
 783
 784         for_each_context(priv, ctx) {
 785                 ctx->staging.cck_basic_rates =
 786                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
 787
 788                 ctx->staging.ofdm_basic_rates =
 789                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
 790         }
 791 }
 792
 793 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
 794 {
 795         /*
 796          * MULTI-FIXME
 797          * See iwlagn_mac_channel_switch.
 798          */
 799         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 800
 801         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 802                 return;
 803
 804         if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING,
 805                                 &priv->shrd->status))
 806                 ieee80211_chswitch_done(ctx->vif, is_success);
 807 }
 808
 809 #ifdef CONFIG_IWLWIFI_DEBUG
 810 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
 811                              enum iwl_rxon_context_id ctxid)
 812 {
 813         struct iwl_rxon_context *ctx = &priv->contexts[ctxid];
 814         struct iwl_rxon_cmd *rxon = &ctx->staging;
 815
 816         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
 817         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
 818         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
 819         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
 820         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
 821                         le32_to_cpu(rxon->filter_flags));
 822         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
 823         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
 824                         rxon->ofdm_basic_rates);
 825         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
 826         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
 827         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
 828         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
 829 }
 830 #endif
 831
 832 static void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
 833 {
 834         unsigned int reload_msec;
 835         unsigned long reload_jiffies;
 836
 837 #ifdef CONFIG_IWLWIFI_DEBUG
 838         if (iwl_have_debug_level(IWL_DL_FW_ERRORS))
 839                 iwl_print_rx_config_cmd(priv, IWL_RXON_CTX_BSS);
 840 #endif
 841
 842         /* Set the FW error flag -- cleared on iwl_down */
 843         set_bit(STATUS_FW_ERROR, &priv->shrd->status);
 844
 845         /* Cancel currently queued command. */
 846         clear_bit(STATUS_HCMD_ACTIVE, &priv->shrd->status);
 847
 848         iwl_abort_notification_waits(&priv->notif_wait);
 849
 850         /* Keep the restart process from trying to send host
 851          * commands by clearing the ready bit */
 852         clear_bit(STATUS_READY, &priv->shrd->status);
 853
 854         wake_up(&priv->shrd->wait_command_queue);
 855
 856         if (!ondemand) {
 857                 /*
 858                  * If firmware keep reloading, then it indicate something
 859                  * serious wrong and firmware having problem to recover
 860                  * from it. Instead of keep trying which will fill the syslog
 861                  * and hang the system, let's just stop it
 862                  */
 863                 reload_jiffies = jiffies;
 864                 reload_msec = jiffies_to_msecs((long) reload_jiffies -
 865                                         (long) priv->reload_jiffies);
 866                 priv->reload_jiffies = reload_jiffies;
 867                 if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
 868                         priv->reload_count++;
 869                         if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
 870                                 IWL_ERR(priv, "BUG_ON, Stop restarting\n");
 871                                 return;
 872                         }
 873                 } else
 874                         priv->reload_count = 0;
 875         }
 876
 877         if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
 878                 if (iwlagn_mod_params.restart_fw) {
 879                         IWL_DEBUG_FW_ERRORS(priv,
 880                                   "Restarting adapter due to uCode error.\n");
 881                         queue_work(priv->workqueue, &priv->restart);
 882                 } else
 883                         IWL_DEBUG_FW_ERRORS(priv,
 884                                   "Detected FW error, but not restarting\n");
 885         }
 886 }
 887
 888 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
 889 {
 890         int ret;
 891         s8 prev_tx_power;
 892         bool defer;
 893         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 894
 895         lockdep_assert_held(&priv->mutex);
 896
 897         if (priv->tx_power_user_lmt == tx_power && !force)
 898                 return 0;
 899
 900         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
 901                 IWL_WARN(priv,
 902                          "Requested user TXPOWER %d below lower limit %d.\n",
 903                          tx_power,
 904                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
 905                 return -EINVAL;
 906         }
 907
 908         if (tx_power > priv->tx_power_device_lmt) {
 909                 IWL_WARN(priv,
 910                         "Requested user TXPOWER %d above upper limit %d.\n",
 911                          tx_power, priv->tx_power_device_lmt);
 912                 return -EINVAL;
 913         }
 914
 915         if (!iwl_is_ready_rf(priv->shrd))
 916                 return -EIO;
 917
 918         /* scan complete and commit_rxon use tx_power_next value,
 919          * it always need to be updated for newest request */
 920         priv->tx_power_next = tx_power;
 921
 922         /* do not set tx power when scanning or channel changing */
 923         defer = test_bit(STATUS_SCANNING, &priv->shrd->status) ||
 924                 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
 925         if (defer && !force) {
 926                 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
 927                 return 0;
 928         }
 929
 930         prev_tx_power = priv->tx_power_user_lmt;
 931         priv->tx_power_user_lmt = tx_power;
 932
 933         ret = iwlagn_send_tx_power(priv);
 934
 935         /* if fail to set tx_power, restore the orig. tx power */
 936         if (ret) {
 937                 priv->tx_power_user_lmt = prev_tx_power;
 938                 priv->tx_power_next = prev_tx_power;
 939         }
 940         return ret;
 941 }
 942
 943 void iwl_send_bt_config(struct iwl_priv *priv)
 944 {
 945         struct iwl_bt_cmd bt_cmd = {
 946                 .lead_time = BT_LEAD_TIME_DEF,
 947                 .max_kill = BT_MAX_KILL_DEF,
 948                 .kill_ack_mask = 0,
 949                 .kill_cts_mask = 0,
 950         };
 951
 952         if (!iwlagn_mod_params.bt_coex_active)
 953                 bt_cmd.flags = BT_COEX_DISABLE;
 954         else
 955                 bt_cmd.flags = BT_COEX_ENABLE;
 956
 957         priv->bt_enable_flag = bt_cmd.flags;
 958         IWL_DEBUG_INFO(priv, "BT coex %s\n",
 959                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
 960
 961         if (iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
 962                              CMD_SYNC, sizeof(struct iwl_bt_cmd), &bt_cmd))
 963                 IWL_ERR(priv, "failed to send BT Coex Config\n");
 964 }
 965
 966 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
 967 {
 968         struct iwl_statistics_cmd statistics_cmd = {
 969                 .configuration_flags =
 970                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
 971         };
 972
 973         if (flags & CMD_ASYNC)
 974                 return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
 975                                               CMD_ASYNC,
 976                                                sizeof(struct iwl_statistics_cmd),
 977                                                &statistics_cmd);
 978         else
 979                 return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
 980                                         CMD_SYNC,
 981                                         sizeof(struct iwl_statistics_cmd),
 982                                         &statistics_cmd);
 983 }
 984
 985
 986
 987
 988 #ifdef CONFIG_IWLWIFI_DEBUGFS
 989
 990 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
 991
 992 void iwl_reset_traffic_log(struct iwl_priv *priv)
 993 {
 994         priv->tx_traffic_idx = 0;
 995         priv->rx_traffic_idx = 0;
 996         if (priv->tx_traffic)
 997                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
 998         if (priv->rx_traffic)
 999                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1000 }
1001
1002 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
1003 {
1004         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1005
1006         if (iwl_have_debug_level(IWL_DL_TX)) {
1007                 if (!priv->tx_traffic) {
1008                         priv->tx_traffic =
1009                                 kzalloc(traffic_size, GFP_KERNEL);
1010                         if (!priv->tx_traffic)
1011                                 return -ENOMEM;
1012                 }
1013         }
1014         if (iwl_have_debug_level(IWL_DL_RX)) {
1015                 if (!priv->rx_traffic) {
1016                         priv->rx_traffic =
1017                                 kzalloc(traffic_size, GFP_KERNEL);
1018                         if (!priv->rx_traffic)
1019                                 return -ENOMEM;
1020                 }
1021         }
1022         iwl_reset_traffic_log(priv);
1023         return 0;
1024 }
1025
1026 void iwl_free_traffic_mem(struct iwl_priv *priv)
1027 {
1028         kfree(priv->tx_traffic);
1029         priv->tx_traffic = NULL;
1030
1031         kfree(priv->rx_traffic);
1032         priv->rx_traffic = NULL;
1033 }
1034
1035 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
1036                       u16 length, struct ieee80211_hdr *header)
1037 {
1038         __le16 fc;
1039         u16 len;
1040
1041         if (likely(!iwl_have_debug_level(IWL_DL_TX)))
1042                 return;
1043
1044         if (!priv->tx_traffic)
1045                 return;
1046
1047         fc = header->frame_control;
1048         if (ieee80211_is_data(fc)) {
1049                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1050                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
1051                 memcpy((priv->tx_traffic +
1052                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1053                        header, len);
1054                 priv->tx_traffic_idx =
1055                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1056         }
1057 }
1058
1059 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
1060                       u16 length, struct ieee80211_hdr *header)
1061 {
1062         __le16 fc;
1063         u16 len;
1064
1065         if (likely(!iwl_have_debug_level(IWL_DL_RX)))
1066                 return;
1067
1068         if (!priv->rx_traffic)
1069                 return;
1070
1071         fc = header->frame_control;
1072         if (ieee80211_is_data(fc)) {
1073                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1074                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
1075                 memcpy((priv->rx_traffic +
1076                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1077                        header, len);
1078                 priv->rx_traffic_idx =
1079                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1080         }
1081 }
1082
1083 const char *get_mgmt_string(int cmd)
1084 {
1085         switch (cmd) {
1086                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1087                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1088                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1089                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1090                 IWL_CMD(MANAGEMENT_PROBE_REQ);
1091                 IWL_CMD(MANAGEMENT_PROBE_RESP);
1092                 IWL_CMD(MANAGEMENT_BEACON);
1093                 IWL_CMD(MANAGEMENT_ATIM);
1094                 IWL_CMD(MANAGEMENT_DISASSOC);
1095                 IWL_CMD(MANAGEMENT_AUTH);
1096                 IWL_CMD(MANAGEMENT_DEAUTH);
1097                 IWL_CMD(MANAGEMENT_ACTION);
1098         default:
1099                 return "UNKNOWN";
1100
1101         }
1102 }
1103
1104 const char *get_ctrl_string(int cmd)
1105 {
1106         switch (cmd) {
1107                 IWL_CMD(CONTROL_BACK_REQ);
1108                 IWL_CMD(CONTROL_BACK);
1109                 IWL_CMD(CONTROL_PSPOLL);
1110                 IWL_CMD(CONTROL_RTS);
1111                 IWL_CMD(CONTROL_CTS);
1112                 IWL_CMD(CONTROL_ACK);
1113                 IWL_CMD(CONTROL_CFEND);
1114                 IWL_CMD(CONTROL_CFENDACK);
1115         default:
1116                 return "UNKNOWN";
1117
1118         }
1119 }
1120
1121 void iwl_clear_traffic_stats(struct iwl_priv *priv)
1122 {
1123         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1124         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1125 }
1126
1127 /*
1128  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
1129  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
1130  * Use debugFs to display the rx/rx_statistics
1131  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
1132  * information will be recorded, but DATA pkt still will be recorded
1133  * for the reason of iwl_led.c need to control the led blinking based on
1134  * number of tx and rx data.
1135  *
1136  */
1137 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1138 {
1139         struct traffic_stats    *stats;
1140
1141         if (is_tx)
1142                 stats = &priv->tx_stats;
1143         else
1144                 stats = &priv->rx_stats;
1145
1146         if (ieee80211_is_mgmt(fc)) {
1147                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1148                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1149                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1150                         break;
1151                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1152                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1153                         break;
1154                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1155                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1156                         break;
1157                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1158                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1159                         break;
1160                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1161                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1162                         break;
1163                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1164                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1165                         break;
1166                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1167                         stats->mgmt[MANAGEMENT_BEACON]++;
1168                         break;
1169                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1170                         stats->mgmt[MANAGEMENT_ATIM]++;
1171                         break;
1172                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1173                         stats->mgmt[MANAGEMENT_DISASSOC]++;
1174                         break;
1175                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1176                         stats->mgmt[MANAGEMENT_AUTH]++;
1177                         break;
1178                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1179                         stats->mgmt[MANAGEMENT_DEAUTH]++;
1180                         break;
1181                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1182                         stats->mgmt[MANAGEMENT_ACTION]++;
1183                         break;
1184                 }
1185         } else if (ieee80211_is_ctl(fc)) {
1186                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1187                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1188                         stats->ctrl[CONTROL_BACK_REQ]++;
1189                         break;
1190                 case cpu_to_le16(IEEE80211_STYPE_BACK):
1191                         stats->ctrl[CONTROL_BACK]++;
1192                         break;
1193                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1194                         stats->ctrl[CONTROL_PSPOLL]++;
1195                         break;
1196                 case cpu_to_le16(IEEE80211_STYPE_RTS):
1197                         stats->ctrl[CONTROL_RTS]++;
1198                         break;
1199                 case cpu_to_le16(IEEE80211_STYPE_CTS):
1200                         stats->ctrl[CONTROL_CTS]++;
1201                         break;
1202                 case cpu_to_le16(IEEE80211_STYPE_ACK):
1203                         stats->ctrl[CONTROL_ACK]++;
1204                         break;
1205                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1206                         stats->ctrl[CONTROL_CFEND]++;
1207                         break;
1208                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1209                         stats->ctrl[CONTROL_CFENDACK]++;
1210                         break;
1211                 }
1212         } else {
1213                 /* data */
1214                 stats->data_cnt++;
1215                 stats->data_bytes += len;
1216         }
1217 }
1218 #endif
1219
1220 static void iwl_force_rf_reset(struct iwl_priv *priv)
1221 {
1222         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
1223                 return;
1224
1225         if (!iwl_is_any_associated(priv)) {
1226                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
1227                 return;
1228         }
1229         /*
1230          * There is no easy and better way to force reset the radio,
1231          * the only known method is switching channel which will force to
1232          * reset and tune the radio.
1233          * Use internal short scan (single channel) operation to should
1234          * achieve this objective.
1235          * Driver should reset the radio when number of consecutive missed
1236          * beacon, or any other uCode error condition detected.
1237          */
1238         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
1239         iwl_internal_short_hw_scan(priv);
1240 }
1241
1242
1243 int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
1244 {
1245         struct iwl_force_reset *force_reset;
1246
1247         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
1248                 return -EINVAL;
1249
1250         if (mode >= IWL_MAX_FORCE_RESET) {
1251                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
1252                 return -EINVAL;
1253         }
1254         force_reset = &priv->force_reset[mode];
1255         force_reset->reset_request_count++;
1256         if (!external) {
1257                 if (force_reset->last_force_reset_jiffies &&
1258                     time_after(force_reset->last_force_reset_jiffies +
1259                     force_reset->reset_duration, jiffies)) {
1260                         IWL_DEBUG_INFO(priv, "force reset rejected\n");
1261                         force_reset->reset_reject_count++;
1262                         return -EAGAIN;
1263                 }
1264         }
1265         force_reset->reset_success_count++;
1266         force_reset->last_force_reset_jiffies = jiffies;
1267         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
1268         switch (mode) {
1269         case IWL_RF_RESET:
1270                 iwl_force_rf_reset(priv);
1271                 break;
1272         case IWL_FW_RESET:
1273                 /*
1274                  * if the request is from external(ex: debugfs),
1275                  * then always perform the request in regardless the module
1276                  * parameter setting
1277                  * if the request is from internal (uCode error or driver
1278                  * detect failure), then fw_restart module parameter
1279                  * need to be check before performing firmware reload
1280                  */
1281                 if (!external && !iwlagn_mod_params.restart_fw) {
1282                         IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1283                                        "module parameter setting\n");
1284                         break;
1285                 }
1286                 IWL_ERR(priv, "On demand firmware reload\n");
1287                 iwlagn_fw_error(priv, true);
1288                 break;
1289         }
1290         return 0;
1291 }
1292
1293
1294 int iwl_cmd_echo_test(struct iwl_priv *priv)
1295 {
1296         int ret;
1297         struct iwl_host_cmd cmd = {
1298                 .id = REPLY_ECHO,
1299                 .len = { 0 },
1300                 .flags = CMD_SYNC,
1301         };
1302
1303         ret = iwl_dvm_send_cmd(priv, &cmd);
1304         if (ret)
1305                 IWL_ERR(priv, "echo testing fail: 0X%x\n", ret);
1306         else
1307                 IWL_DEBUG_INFO(priv, "echo testing pass\n");
1308         return ret;
1309 }
1310
1311 static inline int iwl_check_stuck_queue(struct iwl_priv *priv, int txq)
1312 {
1313         if (iwl_trans_check_stuck_queue(trans(priv), txq)) {
1314                 int ret;
1315                 ret = iwl_force_reset(priv, IWL_FW_RESET, false);
1316                 return (ret == -EAGAIN) ? 0 : 1;
1317         }
1318         return 0;
1319 }
1320
1321 /*
1322  * Making watchdog tick be a quarter of timeout assure we will
1323  * discover the queue hung between timeout and 1.25*timeout
1324  */
1325 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1326
1327 /*
1328  * Watchdog timer callback, we check each tx queue for stuck, if if hung
1329  * we reset the firmware. If everything is fine just rearm the timer.
1330  */
1331 void iwl_bg_watchdog(unsigned long data)
1332 {
1333         struct iwl_priv *priv = (struct iwl_priv *)data;
1334         int cnt;
1335         unsigned long timeout;
1336
1337         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
1338                 return;
1339
1340         if (iwl_is_rfkill(priv->shrd))
1341                 return;
1342
1343         timeout = hw_params(priv).wd_timeout;
1344         if (timeout == 0)
1345                 return;
1346
1347         /* monitor and check for stuck queues */
1348         for (cnt = 0; cnt < cfg(priv)->base_params->num_of_queues; cnt++)
1349                 if (iwl_check_stuck_queue(priv, cnt))
1350                         return;
1351
1352         mod_timer(&priv->watchdog, jiffies +
1353                   msecs_to_jiffies(IWL_WD_TICK(timeout)));
1354 }
1355
1356 void iwl_setup_watchdog(struct iwl_priv *priv)
1357 {
1358         unsigned int timeout = hw_params(priv).wd_timeout;
1359
1360         if (!iwlagn_mod_params.wd_disable) {
1361                 /* use system default */
1362                 if (timeout && !cfg(priv)->base_params->wd_disable)
1363                         mod_timer(&priv->watchdog,
1364                                 jiffies +
1365                                 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1366                 else
1367                         del_timer(&priv->watchdog);
1368         } else {
1369                 /* module parameter overwrite default configuration */
1370                 if (timeout && iwlagn_mod_params.wd_disable == 2)
1371                         mod_timer(&priv->watchdog,
1372                                 jiffies +
1373                                 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1374                 else
1375                         del_timer(&priv->watchdog);
1376         }
1377 }
1378
1379 /**
1380  * iwl_beacon_time_mask_low - mask of lower 32 bit of beacon time
1381  * @priv -- pointer to iwl_priv data structure
1382  * @tsf_bits -- number of bits need to shift for masking)
1383  */
1384 static inline u32 iwl_beacon_time_mask_low(struct iwl_priv *priv,
1385                                            u16 tsf_bits)
1386 {
1387         return (1 << tsf_bits) - 1;
1388 }
1389
1390 /**
1391  * iwl_beacon_time_mask_high - mask of higher 32 bit of beacon time
1392  * @priv -- pointer to iwl_priv data structure
1393  * @tsf_bits -- number of bits need to shift for masking)
1394  */
1395 static inline u32 iwl_beacon_time_mask_high(struct iwl_priv *priv,
1396                                             u16 tsf_bits)
1397 {
1398         return ((1 << (32 - tsf_bits)) - 1) << tsf_bits;
1399 }
1400
1401 /*
1402  * extended beacon time format
1403  * time in usec will be changed into a 32-bit value in extended:internal format
1404  * the extended part is the beacon counts
1405  * the internal part is the time in usec within one beacon interval
1406  */
1407 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
1408 {
1409         u32 quot;
1410         u32 rem;
1411         u32 interval = beacon_interval * TIME_UNIT;
1412
1413         if (!interval || !usec)
1414                 return 0;
1415
1416         quot = (usec / interval) &
1417                 (iwl_beacon_time_mask_high(priv, IWLAGN_EXT_BEACON_TIME_POS) >>
1418                 IWLAGN_EXT_BEACON_TIME_POS);
1419         rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
1420                                    IWLAGN_EXT_BEACON_TIME_POS);
1421
1422         return (quot << IWLAGN_EXT_BEACON_TIME_POS) + rem;
1423 }
1424
1425 /* base is usually what we get from ucode with each received frame,
1426  * the same as HW timer counter counting down
1427  */
1428 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
1429                            u32 addon, u32 beacon_interval)
1430 {
1431         u32 base_low = base & iwl_beacon_time_mask_low(priv,
1432                                 IWLAGN_EXT_BEACON_TIME_POS);
1433         u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
1434                                 IWLAGN_EXT_BEACON_TIME_POS);
1435         u32 interval = beacon_interval * TIME_UNIT;
1436         u32 res = (base & iwl_beacon_time_mask_high(priv,
1437                                 IWLAGN_EXT_BEACON_TIME_POS)) +
1438                                 (addon & iwl_beacon_time_mask_high(priv,
1439                                 IWLAGN_EXT_BEACON_TIME_POS));
1440
1441         if (base_low > addon_low)
1442                 res += base_low - addon_low;
1443         else if (base_low < addon_low) {
1444                 res += interval + base_low - addon_low;
1445                 res += (1 << IWLAGN_EXT_BEACON_TIME_POS);
1446         } else
1447                 res += (1 << IWLAGN_EXT_BEACON_TIME_POS);
1448
1449         return cpu_to_le32(res);
1450 }
1451
1452 void iwl_nic_error(struct iwl_op_mode *op_mode)
1453 {
1454         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1455
1456         iwlagn_fw_error(priv, false);
1457 }
1458
1459 void iwl_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
1460 {
1461         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1462
1463         if (state)
1464                 set_bit(STATUS_RF_KILL_HW, &priv->shrd->status);
1465         else
1466                 clear_bit(STATUS_RF_KILL_HW, &priv->shrd->status);
1467
1468         wiphy_rfkill_set_hw_state(priv->hw->wiphy, state);
1469 }
1470
1471 void iwl_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
1472 {
1473         struct ieee80211_tx_info *info;
1474
1475         info = IEEE80211_SKB_CB(skb);
1476         kmem_cache_free(iwl_tx_cmd_pool, (info->driver_data[1]));
1477         dev_kfree_skb_any(skb);
1478 }