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