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