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 (priv->cfg->ht_params &&
  64             priv->cfg->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         if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_factor)
  80                 ht_info->ampdu_factor = priv->cfg->bt_params->ampdu_factor;
  81         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
  82         if (priv->cfg->bt_params && priv->cfg->bt_params->ampdu_density)
  83                 ht_info->ampdu_density = priv->cfg->bt_params->ampdu_density;
  84
  85         ht_info->mcs.rx_mask[0] = 0xFF;
  86         if (rx_chains_num >= 2)
  87                 ht_info->mcs.rx_mask[1] = 0xFF;
  88         if (rx_chains_num >= 3)
  89                 ht_info->mcs.rx_mask[2] = 0xFF;
  90
  91         /* Highest supported Rx data rate */
  92         max_bit_rate *= rx_chains_num;
  93         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
  94         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
  95
  96         /* Tx MCS capabilities */
  97         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
  98         if (tx_chains_num != rx_chains_num) {
  99                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 100                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 101                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 102         }
 103 }
 104
 105 /**
 106  * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
 107  */
 108 int iwl_init_geos(struct iwl_priv *priv)
 109 {
 110         struct iwl_channel_info *ch;
 111         struct ieee80211_supported_band *sband;
 112         struct ieee80211_channel *channels;
 113         struct ieee80211_channel *geo_ch;
 114         struct ieee80211_rate *rates;
 115         int i = 0;
 116         s8 max_tx_power = IWLAGN_TX_POWER_TARGET_POWER_MIN;
 117
 118         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 119             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 120                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 121                 set_bit(STATUS_GEO_CONFIGURED, &priv->shrd->status);
 122                 return 0;
 123         }
 124
 125         channels = kcalloc(priv->channel_count,
 126                            sizeof(struct ieee80211_channel), GFP_KERNEL);
 127         if (!channels)
 128                 return -ENOMEM;
 129
 130         rates = kcalloc(IWL_RATE_COUNT_LEGACY, sizeof(struct ieee80211_rate),
 131                         GFP_KERNEL);
 132         if (!rates) {
 133                 kfree(channels);
 134                 return -ENOMEM;
 135         }
 136
 137         /* 5.2GHz channels start after the 2.4GHz channels */
 138         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 139         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 140         /* just OFDM */
 141         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 142         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
 143
 144         if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
 145                 iwl_init_ht_hw_capab(priv, &sband->ht_cap,
 146                                          IEEE80211_BAND_5GHZ);
 147
 148         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 149         sband->channels = channels;
 150         /* OFDM & CCK */
 151         sband->bitrates = rates;
 152         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
 153
 154         if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
 155                 iwl_init_ht_hw_capab(priv, &sband->ht_cap,
 156                                          IEEE80211_BAND_2GHZ);
 157
 158         priv->ieee_channels = channels;
 159         priv->ieee_rates = rates;
 160
 161         for (i = 0;  i < priv->channel_count; i++) {
 162                 ch = &priv->channel_info[i];
 163
 164                 /* FIXME: might be removed if scan is OK */
 165                 if (!is_channel_valid(ch))
 166                         continue;
 167
 168                 sband =  &priv->bands[ch->band];
 169
 170                 geo_ch = &sband->channels[sband->n_channels++];
 171
 172                 geo_ch->center_freq =
 173                         ieee80211_channel_to_frequency(ch->channel, ch->band);
 174                 geo_ch->max_power = ch->max_power_avg;
 175                 geo_ch->max_antenna_gain = 0xff;
 176                 geo_ch->hw_value = ch->channel;
 177
 178                 if (is_channel_valid(ch)) {
 179                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 180                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 181
 182                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 183                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 184
 185                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 186                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 187
 188                         geo_ch->flags |= ch->ht40_extension_channel;
 189
 190                         if (ch->max_power_avg > max_tx_power)
 191                                 max_tx_power = ch->max_power_avg;
 192                 } else {
 193                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 194                 }
 195
 196                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 197                                 ch->channel, geo_ch->center_freq,
 198                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 199                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 200                                 "restricted" : "valid",
 201                                  geo_ch->flags);
 202         }
 203
 204         priv->tx_power_device_lmt = max_tx_power;
 205         priv->tx_power_user_lmt = max_tx_power;
 206         priv->tx_power_next = max_tx_power;
 207
 208         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 209              priv->cfg->sku & EEPROM_SKU_CAP_BAND_52GHZ) {
 210                 char buf[32];
 211                 bus_get_hw_id(bus(priv), buf, sizeof(buf));
 212                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 213                         "Please send your %s to maintainer.\n", buf);
 214                 priv->cfg->sku &= ~EEPROM_SKU_CAP_BAND_52GHZ;
 215         }
 216
 217         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 218                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 219                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 220
 221         set_bit(STATUS_GEO_CONFIGURED, &priv->shrd->status);
 222
 223         return 0;
 224 }
 225
 226 /*
 227  * iwl_free_geos - undo allocations in iwl_init_geos
 228  */
 229 void iwl_free_geos(struct iwl_priv *priv)
 230 {
 231         kfree(priv->ieee_channels);
 232         kfree(priv->ieee_rates);
 233         clear_bit(STATUS_GEO_CONFIGURED, &priv->shrd->status);
 234 }
 235
 236 static bool iwl_is_channel_extension(struct iwl_priv *priv,
 237                                      enum ieee80211_band band,
 238                                      u16 channel, u8 extension_chan_offset)
 239 {
 240         const struct iwl_channel_info *ch_info;
 241
 242         ch_info = iwl_get_channel_info(priv, band, channel);
 243         if (!is_channel_valid(ch_info))
 244                 return false;
 245
 246         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 247                 return !(ch_info->ht40_extension_channel &
 248                                         IEEE80211_CHAN_NO_HT40PLUS);
 249         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 250                 return !(ch_info->ht40_extension_channel &
 251                                         IEEE80211_CHAN_NO_HT40MINUS);
 252
 253         return false;
 254 }
 255
 256 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 257                             struct iwl_rxon_context *ctx,
 258                             struct ieee80211_sta_ht_cap *ht_cap)
 259 {
 260         if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
 261                 return false;
 262
 263         /*
 264          * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
 265          * the bit will not set if it is pure 40MHz case
 266          */
 267         if (ht_cap && !ht_cap->ht_supported)
 268                 return false;
 269
 270 #ifdef CONFIG_IWLWIFI_DEBUGFS
 271         if (priv->disable_ht40)
 272                 return false;
 273 #endif
 274
 275         return iwl_is_channel_extension(priv, priv->band,
 276                         le16_to_cpu(ctx->staging.channel),
 277                         ctx->ht.extension_chan_offset);
 278 }
 279
 280 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 281 {
 282         u16 new_val;
 283         u16 beacon_factor;
 284
 285         /*
 286          * If mac80211 hasn't given us a beacon interval, program
 287          * the default into the device (not checking this here
 288          * would cause the adjustment below to return the maximum
 289          * value, which may break PAN.)
 290          */
 291         if (!beacon_val)
 292                 return DEFAULT_BEACON_INTERVAL;
 293
 294         /*
 295          * If the beacon interval we obtained from the peer
 296          * is too large, we'll have to wake up more often
 297          * (and in IBSS case, we'll beacon too much)
 298          *
 299          * For example, if max_beacon_val is 4096, and the
 300          * requested beacon interval is 7000, we'll have to
 301          * use 3500 to be able to wake up on the beacons.
 302          *
 303          * This could badly influence beacon detection stats.
 304          */
 305
 306         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 307         new_val = beacon_val / beacon_factor;
 308
 309         if (!new_val)
 310                 new_val = max_beacon_val;
 311
 312         return new_val;
 313 }
 314
 315 int iwl_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 316 {
 317         u64 tsf;
 318         s32 interval_tm, rem;
 319         struct ieee80211_conf *conf = NULL;
 320         u16 beacon_int;
 321         struct ieee80211_vif *vif = ctx->vif;
 322
 323         conf = &priv->hw->conf;
 324
 325         lockdep_assert_held(&priv->shrd->mutex);
 326
 327         memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
 328
 329         ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
 330         ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
 331
 332         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
 333
 334         /*
 335          * TODO: For IBSS we need to get atim_window from mac80211,
 336          *       for now just always use 0
 337          */
 338         ctx->timing.atim_window = 0;
 339
 340         if (ctx->ctxid == IWL_RXON_CTX_PAN &&
 341             (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&
 342             iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&
 343             priv->contexts[IWL_RXON_CTX_BSS].vif &&
 344             priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {
 345                 ctx->timing.beacon_interval =
 346                         priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;
 347                 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
 348         } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&
 349                    iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&
 350                    priv->contexts[IWL_RXON_CTX_PAN].vif &&
 351                    priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&
 352                    (!iwl_is_associated_ctx(ctx) || !ctx->vif ||
 353                     !ctx->vif->bss_conf.beacon_int)) {
 354                 ctx->timing.beacon_interval =
 355                         priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;
 356                 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);
 357         } else {
 358                 beacon_int = iwl_adjust_beacon_interval(beacon_int,
 359                         IWL_MAX_UCODE_BEACON_INTERVAL * TIME_UNIT);
 360                 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
 361         }
 362
 363         ctx->beacon_int = beacon_int;
 364
 365         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 366         interval_tm = beacon_int * TIME_UNIT;
 367         rem = do_div(tsf, interval_tm);
 368         ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 369
 370         ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
 371
 372         IWL_DEBUG_ASSOC(priv,
 373                         "beacon interval %d beacon timer %d beacon tim %d\n",
 374                         le16_to_cpu(ctx->timing.beacon_interval),
 375                         le32_to_cpu(ctx->timing.beacon_init_val),
 376                         le16_to_cpu(ctx->timing.atim_window));
 377
 378         return iwl_trans_send_cmd_pdu(trans(priv), ctx->rxon_timing_cmd,
 379                                 CMD_SYNC, sizeof(ctx->timing), &ctx->timing);
 380 }
 381
 382 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 383                            int hw_decrypt)
 384 {
 385         struct iwl_rxon_cmd *rxon = &ctx->staging;
 386
 387         if (hw_decrypt)
 388                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 389         else
 390                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 391
 392 }
 393
 394 /* validate RXON structure is valid */
 395 int iwl_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 396 {
 397         struct iwl_rxon_cmd *rxon = &ctx->staging;
 398         u32 errors = 0;
 399
 400         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 401                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
 402                         IWL_WARN(priv, "check 2.4G: wrong narrow\n");
 403                         errors |= BIT(0);
 404                 }
 405                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
 406                         IWL_WARN(priv, "check 2.4G: wrong radar\n");
 407                         errors |= BIT(1);
 408                 }
 409         } else {
 410                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
 411                         IWL_WARN(priv, "check 5.2G: not short slot!\n");
 412                         errors |= BIT(2);
 413                 }
 414                 if (rxon->flags & RXON_FLG_CCK_MSK) {
 415                         IWL_WARN(priv, "check 5.2G: CCK!\n");
 416                         errors |= BIT(3);
 417                 }
 418         }
 419         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
 420                 IWL_WARN(priv, "mac/bssid mcast!\n");
 421                 errors |= BIT(4);
 422         }
 423
 424         /* make sure basic rates 6Mbps and 1Mbps are supported */
 425         if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
 426             (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
 427                 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
 428                 errors |= BIT(5);
 429         }
 430
 431         if (le16_to_cpu(rxon->assoc_id) > 2007) {
 432                 IWL_WARN(priv, "aid > 2007\n");
 433                 errors |= BIT(6);
 434         }
 435
 436         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 437                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
 438                 IWL_WARN(priv, "CCK and short slot\n");
 439                 errors |= BIT(7);
 440         }
 441
 442         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 443                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
 444                 IWL_WARN(priv, "CCK and auto detect");
 445                 errors |= BIT(8);
 446         }
 447
 448         if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 449                             RXON_FLG_TGG_PROTECT_MSK)) ==
 450                             RXON_FLG_TGG_PROTECT_MSK) {
 451                 IWL_WARN(priv, "TGg but no auto-detect\n");
 452                 errors |= BIT(9);
 453         }
 454
 455         if (rxon->channel == 0) {
 456                 IWL_WARN(priv, "zero channel is invalid\n");
 457                 errors |= BIT(10);
 458         }
 459
 460         WARN(errors, "Invalid RXON (%#x), channel %d",
 461              errors, le16_to_cpu(rxon->channel));
 462
 463         return errors ? -EINVAL : 0;
 464 }
 465
 466 /**
 467  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 468  * @priv: staging_rxon is compared to active_rxon
 469  *
 470  * If the RXON structure is changing enough to require a new tune,
 471  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 472  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 473  */
 474 int iwl_full_rxon_required(struct iwl_priv *priv,
 475                            struct iwl_rxon_context *ctx)
 476 {
 477         const struct iwl_rxon_cmd *staging = &ctx->staging;
 478         const struct iwl_rxon_cmd *active = &ctx->active;
 479
 480 #define CHK(cond)                                                       \
 481         if ((cond)) {                                                   \
 482                 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n");   \
 483                 return 1;                                               \
 484         }
 485
 486 #define CHK_NEQ(c1, c2)                                         \
 487         if ((c1) != (c2)) {                                     \
 488                 IWL_DEBUG_INFO(priv, "need full RXON - "        \
 489                                #c1 " != " #c2 " - %d != %d\n",  \
 490                                (c1), (c2));                     \
 491                 return 1;                                       \
 492         }
 493
 494         /* These items are only settable from the full RXON command */
 495         CHK(!iwl_is_associated_ctx(ctx));
 496         CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
 497         CHK(compare_ether_addr(staging->node_addr, active->node_addr));
 498         CHK(compare_ether_addr(staging->wlap_bssid_addr,
 499                                 active->wlap_bssid_addr));
 500         CHK_NEQ(staging->dev_type, active->dev_type);
 501         CHK_NEQ(staging->channel, active->channel);
 502         CHK_NEQ(staging->air_propagation, active->air_propagation);
 503         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
 504                 active->ofdm_ht_single_stream_basic_rates);
 505         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
 506                 active->ofdm_ht_dual_stream_basic_rates);
 507         CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,
 508                 active->ofdm_ht_triple_stream_basic_rates);
 509         CHK_NEQ(staging->assoc_id, active->assoc_id);
 510
 511         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 512          * be updated with the RXON_ASSOC command -- however only some
 513          * flag transitions are allowed using RXON_ASSOC */
 514
 515         /* Check if we are not switching bands */
 516         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
 517                 active->flags & RXON_FLG_BAND_24G_MSK);
 518
 519         /* Check if we are switching association toggle */
 520         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
 521                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
 522
 523 #undef CHK
 524 #undef CHK_NEQ
 525
 526         return 0;
 527 }
 528
 529 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
 530                              struct iwl_ht_config *ht_conf,
 531                              struct iwl_rxon_context *ctx)
 532 {
 533         struct iwl_rxon_cmd *rxon = &ctx->staging;
 534
 535         if (!ctx->ht.enabled) {
 536                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 537                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 538                         RXON_FLG_HT40_PROT_MSK |
 539                         RXON_FLG_HT_PROT_MSK);
 540                 return;
 541         }
 542
 543         /* FIXME: if the definition of ht.protection changed, the "translation"
 544          * will be needed for rxon->flags
 545          */
 546         rxon->flags |= cpu_to_le32(ctx->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
 547
 548         /* Set up channel bandwidth:
 549          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 550         /* clear the HT channel mode before set the mode */
 551         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 552                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 553         if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
 554                 /* pure ht40 */
 555                 if (ctx->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 556                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 557                         /* Note: control channel is opposite of extension channel */
 558                         switch (ctx->ht.extension_chan_offset) {
 559                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 560                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 561                                 break;
 562                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 563                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 564                                 break;
 565                         }
 566                 } else {
 567                         /* Note: control channel is opposite of extension channel */
 568                         switch (ctx->ht.extension_chan_offset) {
 569                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 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_BELOW:
 574                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 575                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 576                                 break;
 577                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 578                         default:
 579                                 /* channel location only valid if in Mixed mode */
 580                                 IWL_ERR(priv, "invalid extension channel offset\n");
 581                                 break;
 582                         }
 583                 }
 584         } else {
 585                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 586         }
 587
 588         iwlagn_set_rxon_chain(priv, ctx);
 589
 590         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 591                         "extension channel offset 0x%x\n",
 592                         le32_to_cpu(rxon->flags), ctx->ht.protection,
 593                         ctx->ht.extension_chan_offset);
 594 }
 595
 596 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 597 {
 598         struct iwl_rxon_context *ctx;
 599
 600         for_each_context(priv, ctx)
 601                 _iwl_set_rxon_ht(priv, ht_conf, ctx);
 602 }
 603
 604 /* Return valid, unused, channel for a passive scan to reset the RF */
 605 u8 iwl_get_single_channel_number(struct iwl_priv *priv,
 606                                  enum ieee80211_band band)
 607 {
 608         const struct iwl_channel_info *ch_info;
 609         int i;
 610         u8 channel = 0;
 611         u8 min, max;
 612         struct iwl_rxon_context *ctx;
 613
 614         if (band == IEEE80211_BAND_5GHZ) {
 615                 min = 14;
 616                 max = priv->channel_count;
 617         } else {
 618                 min = 0;
 619                 max = 14;
 620         }
 621
 622         for (i = min; i < max; i++) {
 623                 bool busy = false;
 624
 625                 for_each_context(priv, ctx) {
 626                         busy = priv->channel_info[i].channel ==
 627                                 le16_to_cpu(ctx->staging.channel);
 628                         if (busy)
 629                                 break;
 630                 }
 631
 632                 if (busy)
 633                         continue;
 634
 635                 channel = priv->channel_info[i].channel;
 636                 ch_info = iwl_get_channel_info(priv, band, channel);
 637                 if (is_channel_valid(ch_info))
 638                         break;
 639         }
 640
 641         return channel;
 642 }
 643
 644 /**
 645  * iwl_set_rxon_channel - Set the band and channel values in staging RXON
 646  * @ch: requested channel as a pointer to struct ieee80211_channel
 647
 648  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 649  * in the staging RXON flag structure based on the ch->band
 650  */
 651 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
 652                          struct iwl_rxon_context *ctx)
 653 {
 654         enum ieee80211_band band = ch->band;
 655         u16 channel = ch->hw_value;
 656
 657         if ((le16_to_cpu(ctx->staging.channel) == channel) &&
 658             (priv->band == band))
 659                 return 0;
 660
 661         ctx->staging.channel = cpu_to_le16(channel);
 662         if (band == IEEE80211_BAND_5GHZ)
 663                 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
 664         else
 665                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
 666
 667         priv->band = band;
 668
 669         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 670
 671         return 0;
 672 }
 673
 674 void iwl_set_flags_for_band(struct iwl_priv *priv,
 675                             struct iwl_rxon_context *ctx,
 676                             enum ieee80211_band band,
 677                             struct ieee80211_vif *vif)
 678 {
 679         if (band == IEEE80211_BAND_5GHZ) {
 680                 ctx->staging.flags &=
 681                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 682                       | RXON_FLG_CCK_MSK);
 683                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 684         } else {
 685                 /* Copied from iwl_post_associate() */
 686                 if (vif && vif->bss_conf.use_short_slot)
 687                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 688                 else
 689                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 690
 691                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
 692                 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
 693                 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
 694         }
 695 }
 696
 697 /*
 698  * initialize rxon structure with default values from eeprom
 699  */
 700 void iwl_connection_init_rx_config(struct iwl_priv *priv,
 701                                    struct iwl_rxon_context *ctx)
 702 {
 703         const struct iwl_channel_info *ch_info;
 704
 705         memset(&ctx->staging, 0, sizeof(ctx->staging));
 706
 707         if (!ctx->vif) {
 708                 ctx->staging.dev_type = ctx->unused_devtype;
 709         } else switch (ctx->vif->type) {
 710         case NL80211_IFTYPE_AP:
 711                 ctx->staging.dev_type = ctx->ap_devtype;
 712                 break;
 713
 714         case NL80211_IFTYPE_STATION:
 715                 ctx->staging.dev_type = ctx->station_devtype;
 716                 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
 717                 break;
 718
 719         case NL80211_IFTYPE_ADHOC:
 720                 ctx->staging.dev_type = ctx->ibss_devtype;
 721                 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
 722                 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
 723                                                   RXON_FILTER_ACCEPT_GRP_MSK;
 724                 break;
 725
 726         default:
 727                 IWL_ERR(priv, "Unsupported interface type %d\n",
 728                         ctx->vif->type);
 729                 break;
 730         }
 731
 732 #if 0
 733         /* TODO:  Figure out when short_preamble would be set and cache from
 734          * that */
 735         if (!hw_to_local(priv->hw)->short_preamble)
 736                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
 737         else
 738                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
 739 #endif
 740
 741         ch_info = iwl_get_channel_info(priv, priv->band,
 742                                        le16_to_cpu(ctx->active.channel));
 743
 744         if (!ch_info)
 745                 ch_info = &priv->channel_info[0];
 746
 747         ctx->staging.channel = cpu_to_le16(ch_info->channel);
 748         priv->band = ch_info->band;
 749
 750         iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
 751
 752         ctx->staging.ofdm_basic_rates =
 753             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
 754         ctx->staging.cck_basic_rates =
 755             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
 756
 757         /* clear both MIX and PURE40 mode flag */
 758         ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
 759                                         RXON_FLG_CHANNEL_MODE_PURE_40);
 760         if (ctx->vif)
 761                 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
 762
 763         ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
 764         ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
 765         ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
 766 }
 767
 768 void iwl_set_rate(struct iwl_priv *priv)
 769 {
 770         const struct ieee80211_supported_band *hw = NULL;
 771         struct ieee80211_rate *rate;
 772         struct iwl_rxon_context *ctx;
 773         int i;
 774
 775         hw = iwl_get_hw_mode(priv, priv->band);
 776         if (!hw) {
 777                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
 778                 return;
 779         }
 780
 781         priv->active_rate = 0;
 782
 783         for (i = 0; i < hw->n_bitrates; i++) {
 784                 rate = &(hw->bitrates[i]);
 785                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
 786                         priv->active_rate |= (1 << rate->hw_value);
 787         }
 788
 789         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
 790
 791         for_each_context(priv, ctx) {
 792                 ctx->staging.cck_basic_rates =
 793                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
 794
 795                 ctx->staging.ofdm_basic_rates =
 796                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
 797         }
 798 }
 799
 800 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
 801 {
 802         /*
 803          * MULTI-FIXME
 804          * See iwlagn_mac_channel_switch.
 805          */
 806         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 807
 808         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 809                 return;
 810
 811         if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING,
 812                                 &priv->shrd->status))
 813                 ieee80211_chswitch_done(ctx->vif, is_success);
 814 }
 815
 816 #ifdef CONFIG_IWLWIFI_DEBUG
 817 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
 818                              enum iwl_rxon_context_id ctxid)
 819 {
 820         struct iwl_rxon_context *ctx = &priv->contexts[ctxid];
 821         struct iwl_rxon_cmd *rxon = &ctx->staging;
 822
 823         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
 824         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
 825         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
 826         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
 827         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
 828                         le32_to_cpu(rxon->filter_flags));
 829         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
 830         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
 831                         rxon->ofdm_basic_rates);
 832         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
 833         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
 834         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
 835         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
 836 }
 837 #endif
 838
 839 static void iwlagn_abort_notification_waits(struct iwl_priv *priv)
 840 {
 841         unsigned long flags;
 842         struct iwl_notification_wait *wait_entry;
 843
 844         spin_lock_irqsave(&priv->notif_wait_lock, flags);
 845         list_for_each_entry(wait_entry, &priv->notif_waits, list)
 846                 wait_entry->aborted = true;
 847         spin_unlock_irqrestore(&priv->notif_wait_lock, flags);
 848
 849         wake_up_all(&priv->notif_waitq);
 850 }
 851
 852 void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
 853 {
 854         unsigned int reload_msec;
 855         unsigned long reload_jiffies;
 856
 857         /* Set the FW error flag -- cleared on iwl_down */
 858         set_bit(STATUS_FW_ERROR, &priv->shrd->status);
 859
 860         /* Cancel currently queued command. */
 861         clear_bit(STATUS_HCMD_ACTIVE, &priv->shrd->status);
 862
 863         iwlagn_abort_notification_waits(priv);
 864
 865         /* Keep the restart process from trying to send host
 866          * commands by clearing the ready bit */
 867         clear_bit(STATUS_READY, &priv->shrd->status);
 868
 869         wake_up(&priv->shrd->wait_command_queue);
 870
 871         if (!ondemand) {
 872                 /*
 873                  * If firmware keep reloading, then it indicate something
 874                  * serious wrong and firmware having problem to recover
 875                  * from it. Instead of keep trying which will fill the syslog
 876                  * and hang the system, let's just stop it
 877                  */
 878                 reload_jiffies = jiffies;
 879                 reload_msec = jiffies_to_msecs((long) reload_jiffies -
 880                                         (long) priv->reload_jiffies);
 881                 priv->reload_jiffies = reload_jiffies;
 882                 if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
 883                         priv->reload_count++;
 884                         if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
 885                                 IWL_ERR(priv, "BUG_ON, Stop restarting\n");
 886                                 return;
 887                         }
 888                 } else
 889                         priv->reload_count = 0;
 890         }
 891
 892         if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
 893                 if (iwlagn_mod_params.restart_fw) {
 894                         IWL_DEBUG_FW_ERRORS(priv,
 895                                   "Restarting adapter due to uCode error.\n");
 896                         queue_work(priv->shrd->workqueue, &priv->restart);
 897                 } else
 898                         IWL_DEBUG_FW_ERRORS(priv,
 899                                   "Detected FW error, but not restarting\n");
 900         }
 901 }
 902
 903 static int iwl_apm_stop_master(struct iwl_priv *priv)
 904 {
 905         int ret = 0;
 906
 907         /* stop device's busmaster DMA activity */
 908         iwl_set_bit(bus(priv), CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 909
 910         ret = iwl_poll_bit(bus(priv), CSR_RESET,
 911                         CSR_RESET_REG_FLAG_MASTER_DISABLED,
 912                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 913         if (ret)
 914                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
 915
 916         IWL_DEBUG_INFO(priv, "stop master\n");
 917
 918         return ret;
 919 }
 920
 921 void iwl_apm_stop(struct iwl_priv *priv)
 922 {
 923         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
 924
 925         clear_bit(STATUS_DEVICE_ENABLED, &priv->shrd->status);
 926
 927         /* Stop device's DMA activity */
 928         iwl_apm_stop_master(priv);
 929
 930         /* Reset the entire device */
 931         iwl_set_bit(bus(priv), CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 932
 933         udelay(10);
 934
 935         /*
 936          * Clear "initialization complete" bit to move adapter from
 937          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
 938          */
 939         iwl_clear_bit(bus(priv), CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 940 }
 941
 942
 943 /*
 944  * Start up NIC's basic functionality after it has been reset
 945  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
 946  * NOTE:  This does not load uCode nor start the embedded processor
 947  */
 948 int iwl_apm_init(struct iwl_priv *priv)
 949 {
 950         int ret = 0;
 951         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
 952
 953         /*
 954          * Use "set_bit" below rather than "write", to preserve any hardware
 955          * bits already set by default after reset.
 956          */
 957
 958         /* Disable L0S exit timer (platform NMI Work/Around) */
 959         iwl_set_bit(bus(priv), CSR_GIO_CHICKEN_BITS,
 960                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 961
 962         /*
 963          * Disable L0s without affecting L1;
 964          *  don't wait for ICH L0s (ICH bug W/A)
 965          */
 966         iwl_set_bit(bus(priv), CSR_GIO_CHICKEN_BITS,
 967                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
 968
 969         /* Set FH wait threshold to maximum (HW error during stress W/A) */
 970         iwl_set_bit(bus(priv), CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
 971
 972         /*
 973          * Enable HAP INTA (interrupt from management bus) to
 974          * wake device's PCI Express link L1a -> L0s
 975          */
 976         iwl_set_bit(bus(priv), CSR_HW_IF_CONFIG_REG,
 977                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
 978
 979         bus_apm_config(bus(priv));
 980
 981         /* Configure analog phase-lock-loop before activating to D0A */
 982         if (priv->cfg->base_params->pll_cfg_val)
 983                 iwl_set_bit(bus(priv), CSR_ANA_PLL_CFG,
 984                             priv->cfg->base_params->pll_cfg_val);
 985
 986         /*
 987          * Set "initialization complete" bit to move adapter from
 988          * D0U* --> D0A* (powered-up active) state.
 989          */
 990         iwl_set_bit(bus(priv), CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 991
 992         /*
 993          * Wait for clock stabilization; once stabilized, access to
 994          * device-internal resources is supported, e.g. iwl_write_prph()
 995          * and accesses to uCode SRAM.
 996          */
 997         ret = iwl_poll_bit(bus(priv), CSR_GP_CNTRL,
 998                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
 999                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1000         if (ret < 0) {
1001                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1002                 goto out;
1003         }
1004
1005         /*
1006          * Enable DMA clock and wait for it to stabilize.
1007          *
1008          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1009          * do not disable clocks.  This preserves any hardware bits already
1010          * set by default in "CLK_CTRL_REG" after reset.
1011          */
1012         iwl_write_prph(bus(priv), APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
1013         udelay(20);
1014
1015         /* Disable L1-Active */
1016         iwl_set_bits_prph(bus(priv), APMG_PCIDEV_STT_REG,
1017                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1018
1019         set_bit(STATUS_DEVICE_ENABLED, &priv->shrd->status);
1020
1021 out:
1022         return ret;
1023 }
1024
1025
1026 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1027 {
1028         int ret;
1029         s8 prev_tx_power;
1030         bool defer;
1031         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1032
1033         lockdep_assert_held(&priv->shrd->mutex);
1034
1035         if (priv->tx_power_user_lmt == tx_power && !force)
1036                 return 0;
1037
1038         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1039                 IWL_WARN(priv,
1040                          "Requested user TXPOWER %d below lower limit %d.\n",
1041                          tx_power,
1042                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
1043                 return -EINVAL;
1044         }
1045
1046         if (tx_power > priv->tx_power_device_lmt) {
1047                 IWL_WARN(priv,
1048                         "Requested user TXPOWER %d above upper limit %d.\n",
1049                          tx_power, priv->tx_power_device_lmt);
1050                 return -EINVAL;
1051         }
1052
1053         if (!iwl_is_ready_rf(priv->shrd))
1054                 return -EIO;
1055
1056         /* scan complete and commit_rxon use tx_power_next value,
1057          * it always need to be updated for newest request */
1058         priv->tx_power_next = tx_power;
1059
1060         /* do not set tx power when scanning or channel changing */
1061         defer = test_bit(STATUS_SCANNING, &priv->shrd->status) ||
1062                 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
1063         if (defer && !force) {
1064                 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
1065                 return 0;
1066         }
1067
1068         prev_tx_power = priv->tx_power_user_lmt;
1069         priv->tx_power_user_lmt = tx_power;
1070
1071         ret = iwlagn_send_tx_power(priv);
1072
1073         /* if fail to set tx_power, restore the orig. tx power */
1074         if (ret) {
1075                 priv->tx_power_user_lmt = prev_tx_power;
1076                 priv->tx_power_next = prev_tx_power;
1077         }
1078         return ret;
1079 }
1080
1081 void iwl_send_bt_config(struct iwl_priv *priv)
1082 {
1083         struct iwl_bt_cmd bt_cmd = {
1084                 .lead_time = BT_LEAD_TIME_DEF,
1085                 .max_kill = BT_MAX_KILL_DEF,
1086                 .kill_ack_mask = 0,
1087                 .kill_cts_mask = 0,
1088         };
1089
1090         if (!iwlagn_mod_params.bt_coex_active)
1091                 bt_cmd.flags = BT_COEX_DISABLE;
1092         else
1093                 bt_cmd.flags = BT_COEX_ENABLE;
1094
1095         priv->bt_enable_flag = bt_cmd.flags;
1096         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1097                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1098
1099         if (iwl_trans_send_cmd_pdu(trans(priv), REPLY_BT_CONFIG,
1100                              CMD_SYNC, sizeof(struct iwl_bt_cmd), &bt_cmd))
1101                 IWL_ERR(priv, "failed to send BT Coex Config\n");
1102 }
1103
1104 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1105 {
1106         struct iwl_statistics_cmd statistics_cmd = {
1107                 .configuration_flags =
1108                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1109         };
1110
1111         if (flags & CMD_ASYNC)
1112                 return iwl_trans_send_cmd_pdu(trans(priv), REPLY_STATISTICS_CMD,
1113                                               CMD_ASYNC,
1114                                                sizeof(struct iwl_statistics_cmd),
1115                                                &statistics_cmd);
1116         else
1117                 return iwl_trans_send_cmd_pdu(trans(priv), REPLY_STATISTICS_CMD,
1118                                         CMD_SYNC,
1119                                         sizeof(struct iwl_statistics_cmd),
1120                                         &statistics_cmd);
1121 }
1122
1123 int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1124                     struct ieee80211_vif *vif, u16 queue,
1125                     const struct ieee80211_tx_queue_params *params)
1126 {
1127         struct iwl_priv *priv = hw->priv;
1128         struct iwl_rxon_context *ctx;
1129         unsigned long flags;
1130         int q;
1131
1132         IWL_DEBUG_MAC80211(priv, "enter\n");
1133
1134         if (!iwl_is_ready_rf(priv->shrd)) {
1135                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1136                 return -EIO;
1137         }
1138
1139         if (queue >= AC_NUM) {
1140                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1141                 return 0;
1142         }
1143
1144         q = AC_NUM - 1 - queue;
1145
1146         spin_lock_irqsave(&priv->shrd->lock, flags);
1147
1148         /*
1149          * MULTI-FIXME
1150          * This may need to be done per interface in nl80211/cfg80211/mac80211.
1151          */
1152         for_each_context(priv, ctx) {
1153                 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1154                         cpu_to_le16(params->cw_min);
1155                 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1156                         cpu_to_le16(params->cw_max);
1157                 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1158                 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1159                                 cpu_to_le16((params->txop * 32));
1160
1161                 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1162         }
1163
1164         spin_unlock_irqrestore(&priv->shrd->lock, flags);
1165
1166         IWL_DEBUG_MAC80211(priv, "leave\n");
1167         return 0;
1168 }
1169
1170 int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1171 {
1172         struct iwl_priv *priv = hw->priv;
1173
1174         return priv->ibss_manager == IWL_IBSS_MANAGER;
1175 }
1176
1177 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1178 {
1179         iwl_connection_init_rx_config(priv, ctx);
1180
1181         iwlagn_set_rxon_chain(priv, ctx);
1182
1183         return iwlagn_commit_rxon(priv, ctx);
1184 }
1185
1186 static int iwl_setup_interface(struct iwl_priv *priv,
1187                                struct iwl_rxon_context *ctx)
1188 {
1189         struct ieee80211_vif *vif = ctx->vif;
1190         int err;
1191
1192         lockdep_assert_held(&priv->shrd->mutex);
1193
1194         /*
1195          * This variable will be correct only when there's just
1196          * a single context, but all code using it is for hardware
1197          * that supports only one context.
1198          */
1199         priv->iw_mode = vif->type;
1200
1201         ctx->is_active = true;
1202
1203         err = iwl_set_mode(priv, ctx);
1204         if (err) {
1205                 if (!ctx->always_active)
1206                         ctx->is_active = false;
1207                 return err;
1208         }
1209
1210         if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1211             vif->type == NL80211_IFTYPE_ADHOC) {
1212                 /*
1213                  * pretend to have high BT traffic as long as we
1214                  * are operating in IBSS mode, as this will cause
1215                  * the rate scaling etc. to behave as intended.
1216                  */
1217                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1218         }
1219
1220         return 0;
1221 }
1222
1223 int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1224                              struct ieee80211_vif *vif)
1225 {
1226         struct iwl_priv *priv = hw->priv;
1227         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1228         struct iwl_rxon_context *tmp, *ctx = NULL;
1229         int err;
1230         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1231
1232         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1233                            viftype, vif->addr);
1234
1235         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1236
1237         mutex_lock(&priv->shrd->mutex);
1238
1239         iwlagn_disable_roc(priv);
1240
1241         if (!iwl_is_ready_rf(priv->shrd)) {
1242                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1243                 err = -EINVAL;
1244                 goto out;
1245         }
1246
1247         for_each_context(priv, tmp) {
1248                 u32 possible_modes =
1249                         tmp->interface_modes | tmp->exclusive_interface_modes;
1250
1251                 if (tmp->vif) {
1252                         /* check if this busy context is exclusive */
1253                         if (tmp->exclusive_interface_modes &
1254                                                 BIT(tmp->vif->type)) {
1255                                 err = -EINVAL;
1256                                 goto out;
1257                         }
1258                         continue;
1259                 }
1260
1261                 if (!(possible_modes & BIT(viftype)))
1262                         continue;
1263
1264                 /* have maybe usable context w/o interface */
1265                 ctx = tmp;
1266                 break;
1267         }
1268
1269         if (!ctx) {
1270                 err = -EOPNOTSUPP;
1271                 goto out;
1272         }
1273
1274         vif_priv->ctx = ctx;
1275         ctx->vif = vif;
1276
1277         err = iwl_setup_interface(priv, ctx);
1278         if (!err)
1279                 goto out;
1280
1281         ctx->vif = NULL;
1282         priv->iw_mode = NL80211_IFTYPE_STATION;
1283  out:
1284         mutex_unlock(&priv->shrd->mutex);
1285
1286         IWL_DEBUG_MAC80211(priv, "leave\n");
1287         return err;
1288 }
1289
1290 static void iwl_teardown_interface(struct iwl_priv *priv,
1291                                    struct ieee80211_vif *vif,
1292                                    bool mode_change)
1293 {
1294         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1295
1296         lockdep_assert_held(&priv->shrd->mutex);
1297
1298         if (priv->scan_vif == vif) {
1299                 iwl_scan_cancel_timeout(priv, 200);
1300                 iwl_force_scan_end(priv);
1301         }
1302
1303         if (!mode_change) {
1304                 iwl_set_mode(priv, ctx);
1305                 if (!ctx->always_active)
1306                         ctx->is_active = false;
1307         }
1308
1309         /*
1310          * When removing the IBSS interface, overwrite the
1311          * BT traffic load with the stored one from the last
1312          * notification, if any. If this is a device that
1313          * doesn't implement this, this has no effect since
1314          * both values are the same and zero.
1315          */
1316         if (vif->type == NL80211_IFTYPE_ADHOC)
1317                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1318 }
1319
1320 void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1321                               struct ieee80211_vif *vif)
1322 {
1323         struct iwl_priv *priv = hw->priv;
1324         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1325
1326         IWL_DEBUG_MAC80211(priv, "enter\n");
1327
1328         mutex_lock(&priv->shrd->mutex);
1329
1330         if (WARN_ON(ctx->vif != vif)) {
1331                 struct iwl_rxon_context *tmp;
1332                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1333                 for_each_context(priv, tmp)
1334                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1335                                 tmp->ctxid, tmp, tmp->vif);
1336         }
1337         ctx->vif = NULL;
1338
1339         iwl_teardown_interface(priv, vif, false);
1340
1341         mutex_unlock(&priv->shrd->mutex);
1342
1343         IWL_DEBUG_MAC80211(priv, "leave\n");
1344
1345 }
1346
1347 #ifdef CONFIG_IWLWIFI_DEBUGFS
1348
1349 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
1350
1351 void iwl_reset_traffic_log(struct iwl_priv *priv)
1352 {
1353         priv->tx_traffic_idx = 0;
1354         priv->rx_traffic_idx = 0;
1355         if (priv->tx_traffic)
1356                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1357         if (priv->rx_traffic)
1358                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1359 }
1360
1361 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
1362 {
1363         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1364
1365         if (iwl_get_debug_level(priv->shrd) & IWL_DL_TX) {
1366                 if (!priv->tx_traffic) {
1367                         priv->tx_traffic =
1368                                 kzalloc(traffic_size, GFP_KERNEL);
1369                         if (!priv->tx_traffic)
1370                                 return -ENOMEM;
1371                 }
1372         }
1373         if (iwl_get_debug_level(priv->shrd) & IWL_DL_RX) {
1374                 if (!priv->rx_traffic) {
1375                         priv->rx_traffic =
1376                                 kzalloc(traffic_size, GFP_KERNEL);
1377                         if (!priv->rx_traffic)
1378                                 return -ENOMEM;
1379                 }
1380         }
1381         iwl_reset_traffic_log(priv);
1382         return 0;
1383 }
1384
1385 void iwl_free_traffic_mem(struct iwl_priv *priv)
1386 {
1387         kfree(priv->tx_traffic);
1388         priv->tx_traffic = NULL;
1389
1390         kfree(priv->rx_traffic);
1391         priv->rx_traffic = NULL;
1392 }
1393
1394 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
1395                       u16 length, struct ieee80211_hdr *header)
1396 {
1397         __le16 fc;
1398         u16 len;
1399
1400         if (likely(!(iwl_get_debug_level(priv->shrd) & IWL_DL_TX)))
1401                 return;
1402
1403         if (!priv->tx_traffic)
1404                 return;
1405
1406         fc = header->frame_control;
1407         if (ieee80211_is_data(fc)) {
1408                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1409                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
1410                 memcpy((priv->tx_traffic +
1411                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1412                        header, len);
1413                 priv->tx_traffic_idx =
1414                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1415         }
1416 }
1417
1418 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
1419                       u16 length, struct ieee80211_hdr *header)
1420 {
1421         __le16 fc;
1422         u16 len;
1423
1424         if (likely(!(iwl_get_debug_level(priv->shrd) & IWL_DL_RX)))
1425                 return;
1426
1427         if (!priv->rx_traffic)
1428                 return;
1429
1430         fc = header->frame_control;
1431         if (ieee80211_is_data(fc)) {
1432                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1433                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
1434                 memcpy((priv->rx_traffic +
1435                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1436                        header, len);
1437                 priv->rx_traffic_idx =
1438                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1439         }
1440 }
1441
1442 const char *get_mgmt_string(int cmd)
1443 {
1444         switch (cmd) {
1445                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1446                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1447                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1448                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1449                 IWL_CMD(MANAGEMENT_PROBE_REQ);
1450                 IWL_CMD(MANAGEMENT_PROBE_RESP);
1451                 IWL_CMD(MANAGEMENT_BEACON);
1452                 IWL_CMD(MANAGEMENT_ATIM);
1453                 IWL_CMD(MANAGEMENT_DISASSOC);
1454                 IWL_CMD(MANAGEMENT_AUTH);
1455                 IWL_CMD(MANAGEMENT_DEAUTH);
1456                 IWL_CMD(MANAGEMENT_ACTION);
1457         default:
1458                 return "UNKNOWN";
1459
1460         }
1461 }
1462
1463 const char *get_ctrl_string(int cmd)
1464 {
1465         switch (cmd) {
1466                 IWL_CMD(CONTROL_BACK_REQ);
1467                 IWL_CMD(CONTROL_BACK);
1468                 IWL_CMD(CONTROL_PSPOLL);
1469                 IWL_CMD(CONTROL_RTS);
1470                 IWL_CMD(CONTROL_CTS);
1471                 IWL_CMD(CONTROL_ACK);
1472                 IWL_CMD(CONTROL_CFEND);
1473                 IWL_CMD(CONTROL_CFENDACK);
1474         default:
1475                 return "UNKNOWN";
1476
1477         }
1478 }
1479
1480 void iwl_clear_traffic_stats(struct iwl_priv *priv)
1481 {
1482         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1483         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1484 }
1485
1486 /*
1487  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
1488  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
1489  * Use debugFs to display the rx/rx_statistics
1490  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
1491  * information will be recorded, but DATA pkt still will be recorded
1492  * for the reason of iwl_led.c need to control the led blinking based on
1493  * number of tx and rx data.
1494  *
1495  */
1496 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1497 {
1498         struct traffic_stats    *stats;
1499
1500         if (is_tx)
1501                 stats = &priv->tx_stats;
1502         else
1503                 stats = &priv->rx_stats;
1504
1505         if (ieee80211_is_mgmt(fc)) {
1506                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1507                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1508                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1509                         break;
1510                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1511                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1512                         break;
1513                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1514                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1515                         break;
1516                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1517                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1518                         break;
1519                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1520                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1521                         break;
1522                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1523                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1524                         break;
1525                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1526                         stats->mgmt[MANAGEMENT_BEACON]++;
1527                         break;
1528                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1529                         stats->mgmt[MANAGEMENT_ATIM]++;
1530                         break;
1531                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1532                         stats->mgmt[MANAGEMENT_DISASSOC]++;
1533                         break;
1534                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1535                         stats->mgmt[MANAGEMENT_AUTH]++;
1536                         break;
1537                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1538                         stats->mgmt[MANAGEMENT_DEAUTH]++;
1539                         break;
1540                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1541                         stats->mgmt[MANAGEMENT_ACTION]++;
1542                         break;
1543                 }
1544         } else if (ieee80211_is_ctl(fc)) {
1545                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1546                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1547                         stats->ctrl[CONTROL_BACK_REQ]++;
1548                         break;
1549                 case cpu_to_le16(IEEE80211_STYPE_BACK):
1550                         stats->ctrl[CONTROL_BACK]++;
1551                         break;
1552                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1553                         stats->ctrl[CONTROL_PSPOLL]++;
1554                         break;
1555                 case cpu_to_le16(IEEE80211_STYPE_RTS):
1556                         stats->ctrl[CONTROL_RTS]++;
1557                         break;
1558                 case cpu_to_le16(IEEE80211_STYPE_CTS):
1559                         stats->ctrl[CONTROL_CTS]++;
1560                         break;
1561                 case cpu_to_le16(IEEE80211_STYPE_ACK):
1562                         stats->ctrl[CONTROL_ACK]++;
1563                         break;
1564                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1565                         stats->ctrl[CONTROL_CFEND]++;
1566                         break;
1567                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1568                         stats->ctrl[CONTROL_CFENDACK]++;
1569                         break;
1570                 }
1571         } else {
1572                 /* data */
1573                 stats->data_cnt++;
1574                 stats->data_bytes += len;
1575         }
1576 }
1577 #endif
1578
1579 static void iwl_force_rf_reset(struct iwl_priv *priv)
1580 {
1581         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
1582                 return;
1583
1584         if (!iwl_is_any_associated(priv)) {
1585                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
1586                 return;
1587         }
1588         /*
1589          * There is no easy and better way to force reset the radio,
1590          * the only known method is switching channel which will force to
1591          * reset and tune the radio.
1592          * Use internal short scan (single channel) operation to should
1593          * achieve this objective.
1594          * Driver should reset the radio when number of consecutive missed
1595          * beacon, or any other uCode error condition detected.
1596          */
1597         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
1598         iwl_internal_short_hw_scan(priv);
1599 }
1600
1601
1602 int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
1603 {
1604         struct iwl_force_reset *force_reset;
1605
1606         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
1607                 return -EINVAL;
1608
1609         if (mode >= IWL_MAX_FORCE_RESET) {
1610                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
1611                 return -EINVAL;
1612         }
1613         force_reset = &priv->force_reset[mode];
1614         force_reset->reset_request_count++;
1615         if (!external) {
1616                 if (force_reset->last_force_reset_jiffies &&
1617                     time_after(force_reset->last_force_reset_jiffies +
1618                     force_reset->reset_duration, jiffies)) {
1619                         IWL_DEBUG_INFO(priv, "force reset rejected\n");
1620                         force_reset->reset_reject_count++;
1621                         return -EAGAIN;
1622                 }
1623         }
1624         force_reset->reset_success_count++;
1625         force_reset->last_force_reset_jiffies = jiffies;
1626         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
1627         switch (mode) {
1628         case IWL_RF_RESET:
1629                 iwl_force_rf_reset(priv);
1630                 break;
1631         case IWL_FW_RESET:
1632                 /*
1633                  * if the request is from external(ex: debugfs),
1634                  * then always perform the request in regardless the module
1635                  * parameter setting
1636                  * if the request is from internal (uCode error or driver
1637                  * detect failure), then fw_restart module parameter
1638                  * need to be check before performing firmware reload
1639                  */
1640                 if (!external && !iwlagn_mod_params.restart_fw) {
1641                         IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1642                                        "module parameter setting\n");
1643                         break;
1644                 }
1645                 IWL_ERR(priv, "On demand firmware reload\n");
1646                 iwlagn_fw_error(priv, true);
1647                 break;
1648         }
1649         return 0;
1650 }
1651
1652 int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1653                                 struct ieee80211_vif *vif,
1654                                 enum nl80211_iftype newtype, bool newp2p)
1655 {
1656         struct iwl_priv *priv = hw->priv;
1657         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1658         struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1659         struct iwl_rxon_context *tmp;
1660         enum nl80211_iftype newviftype = newtype;
1661         u32 interface_modes;
1662         int err;
1663
1664         IWL_DEBUG_MAC80211(priv, "enter\n");
1665
1666         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1667
1668         mutex_lock(&priv->shrd->mutex);
1669
1670         if (!ctx->vif || !iwl_is_ready_rf(priv->shrd)) {
1671                 /*
1672                  * Huh? But wait ... this can maybe happen when
1673                  * we're in the middle of a firmware restart!
1674                  */
1675                 err = -EBUSY;
1676                 goto out;
1677         }
1678
1679         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1680
1681         if (!(interface_modes & BIT(newtype))) {
1682                 err = -EBUSY;
1683                 goto out;
1684         }
1685
1686         /*
1687          * Refuse a change that should be done by moving from the PAN
1688          * context to the BSS context instead, if the BSS context is
1689          * available and can support the new interface type.
1690          */
1691         if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1692             (bss_ctx->interface_modes & BIT(newtype) ||
1693              bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1694                 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1695                 err = -EBUSY;
1696                 goto out;
1697         }
1698
1699         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1700                 for_each_context(priv, tmp) {
1701                         if (ctx == tmp)
1702                                 continue;
1703
1704                         if (!tmp->vif)
1705                                 continue;
1706
1707                         /*
1708                          * The current mode switch would be exclusive, but
1709                          * another context is active ... refuse the switch.
1710                          */
1711                         err = -EBUSY;
1712                         goto out;
1713                 }
1714         }
1715
1716         /* success */
1717         iwl_teardown_interface(priv, vif, true);
1718         vif->type = newviftype;
1719         vif->p2p = newp2p;
1720         err = iwl_setup_interface(priv, ctx);
1721         WARN_ON(err);
1722         /*
1723          * We've switched internally, but submitting to the
1724          * device may have failed for some reason. Mask this
1725          * error, because otherwise mac80211 will not switch
1726          * (and set the interface type back) and we'll be
1727          * out of sync with it.
1728          */
1729         err = 0;
1730
1731  out:
1732         mutex_unlock(&priv->shrd->mutex);
1733         IWL_DEBUG_MAC80211(priv, "leave\n");
1734
1735         return err;
1736 }
1737
1738 int iwl_cmd_echo_test(struct iwl_priv *priv)
1739 {
1740         int ret;
1741         struct iwl_host_cmd cmd = {
1742                 .id = REPLY_ECHO,
1743                 .flags = CMD_SYNC,
1744         };
1745
1746         ret = iwl_trans_send_cmd(trans(priv), &cmd);
1747         if (ret)
1748                 IWL_ERR(priv, "echo testing fail: 0X%x\n", ret);
1749         else
1750                 IWL_DEBUG_INFO(priv, "echo testing pass\n");
1751         return ret;
1752 }
1753
1754 static inline int iwl_check_stuck_queue(struct iwl_priv *priv, int txq)
1755 {
1756         if (iwl_trans_check_stuck_queue(trans(priv), txq)) {
1757                 int ret;
1758                 ret = iwl_force_reset(priv, IWL_FW_RESET, false);
1759                 return (ret == -EAGAIN) ? 0 : 1;
1760         }
1761         return 0;
1762 }
1763
1764 /*
1765  * Making watchdog tick be a quarter of timeout assure we will
1766  * discover the queue hung between timeout and 1.25*timeout
1767  */
1768 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1769
1770 /*
1771  * Watchdog timer callback, we check each tx queue for stuck, if if hung
1772  * we reset the firmware. If everything is fine just rearm the timer.
1773  */
1774 void iwl_bg_watchdog(unsigned long data)
1775 {
1776         struct iwl_priv *priv = (struct iwl_priv *)data;
1777         int cnt;
1778         unsigned long timeout;
1779
1780         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
1781                 return;
1782
1783         if (iwl_is_rfkill(priv->shrd))
1784                 return;
1785
1786         timeout = priv->cfg->base_params->wd_timeout;
1787         if (timeout == 0)
1788                 return;
1789
1790         /* monitor and check for stuck cmd queue */
1791         if (iwl_check_stuck_queue(priv, priv->shrd->cmd_queue))
1792                 return;
1793
1794         /* monitor and check for other stuck queues */
1795         if (iwl_is_any_associated(priv)) {
1796                 for (cnt = 0; cnt < hw_params(priv).max_txq_num; cnt++) {
1797                         /* skip as we already checked the command queue */
1798                         if (cnt == priv->shrd->cmd_queue)
1799                                 continue;
1800                         if (iwl_check_stuck_queue(priv, cnt))
1801                                 return;
1802                 }
1803         }
1804
1805         mod_timer(&priv->watchdog, jiffies +
1806                   msecs_to_jiffies(IWL_WD_TICK(timeout)));
1807 }
1808
1809 void iwl_setup_watchdog(struct iwl_priv *priv)
1810 {
1811         unsigned int timeout = priv->cfg->base_params->wd_timeout;
1812
1813         if (!iwlagn_mod_params.wd_disable) {
1814                 /* use system default */
1815                 if (timeout && !priv->cfg->base_params->wd_disable)
1816                         mod_timer(&priv->watchdog,
1817                                 jiffies +
1818                                 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1819                 else
1820                         del_timer(&priv->watchdog);
1821         } else {
1822                 /* module parameter overwrite default configuration */
1823                 if (timeout && iwlagn_mod_params.wd_disable == 2)
1824                         mod_timer(&priv->watchdog,
1825                                 jiffies +
1826                                 msecs_to_jiffies(IWL_WD_TICK(timeout)));
1827                 else
1828                         del_timer(&priv->watchdog);
1829         }
1830 }
1831
1832 /**
1833  * iwl_beacon_time_mask_low - mask of lower 32 bit of beacon time
1834  * @priv -- pointer to iwl_priv data structure
1835  * @tsf_bits -- number of bits need to shift for masking)
1836  */
1837 static inline u32 iwl_beacon_time_mask_low(struct iwl_priv *priv,
1838                                            u16 tsf_bits)
1839 {
1840         return (1 << tsf_bits) - 1;
1841 }
1842
1843 /**
1844  * iwl_beacon_time_mask_high - mask of higher 32 bit of beacon time
1845  * @priv -- pointer to iwl_priv data structure
1846  * @tsf_bits -- number of bits need to shift for masking)
1847  */
1848 static inline u32 iwl_beacon_time_mask_high(struct iwl_priv *priv,
1849                                             u16 tsf_bits)
1850 {
1851         return ((1 << (32 - tsf_bits)) - 1) << tsf_bits;
1852 }
1853
1854 /*
1855  * extended beacon time format
1856  * time in usec will be changed into a 32-bit value in extended:internal format
1857  * the extended part is the beacon counts
1858  * the internal part is the time in usec within one beacon interval
1859  */
1860 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
1861 {
1862         u32 quot;
1863         u32 rem;
1864         u32 interval = beacon_interval * TIME_UNIT;
1865
1866         if (!interval || !usec)
1867                 return 0;
1868
1869         quot = (usec / interval) &
1870                 (iwl_beacon_time_mask_high(priv, IWLAGN_EXT_BEACON_TIME_POS) >>
1871                 IWLAGN_EXT_BEACON_TIME_POS);
1872         rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
1873                                    IWLAGN_EXT_BEACON_TIME_POS);
1874
1875         return (quot << IWLAGN_EXT_BEACON_TIME_POS) + rem;
1876 }
1877
1878 /* base is usually what we get from ucode with each received frame,
1879  * the same as HW timer counter counting down
1880  */
1881 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
1882                            u32 addon, u32 beacon_interval)
1883 {
1884         u32 base_low = base & iwl_beacon_time_mask_low(priv,
1885                                 IWLAGN_EXT_BEACON_TIME_POS);
1886         u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
1887                                 IWLAGN_EXT_BEACON_TIME_POS);
1888         u32 interval = beacon_interval * TIME_UNIT;
1889         u32 res = (base & iwl_beacon_time_mask_high(priv,
1890                                 IWLAGN_EXT_BEACON_TIME_POS)) +
1891                                 (addon & iwl_beacon_time_mask_high(priv,
1892                                 IWLAGN_EXT_BEACON_TIME_POS));
1893
1894         if (base_low > addon_low)
1895                 res += base_low - addon_low;
1896         else if (base_low < addon_low) {
1897                 res += interval + base_low - addon_low;
1898                 res += (1 << IWLAGN_EXT_BEACON_TIME_POS);
1899         } else
1900                 res += (1 << IWLAGN_EXT_BEACON_TIME_POS);
1901
1902         return cpu_to_le32(res);
1903 }
1904
1905 void iwl_start_tx_ba_trans_ready(struct iwl_priv *priv,
1906                                  enum iwl_rxon_context_id ctx,
1907                                  u8 sta_id, u8 tid)
1908 {
1909         struct ieee80211_vif *vif;
1910         u8 *addr = priv->stations[sta_id].sta.sta.addr;
1911
1912         if (ctx == NUM_IWL_RXON_CTX)
1913                 ctx = priv->stations[sta_id].ctxid;
1914         vif = priv->contexts[ctx].vif;
1915
1916         ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
1917 }
1918
1919 void iwl_stop_tx_ba_trans_ready(struct iwl_priv *priv,
1920                                 enum iwl_rxon_context_id ctx,
1921                                 u8 sta_id, u8 tid)
1922 {
1923         struct ieee80211_vif *vif;
1924         u8 *addr = priv->stations[sta_id].sta.sta.addr;
1925
1926         if (ctx == NUM_IWL_RXON_CTX)
1927                 ctx = priv->stations[sta_id].ctxid;
1928         vif = priv->contexts[ctx].vif;
1929
1930         ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
1931 }
1932
1933 void iwl_set_hw_rfkill_state(struct iwl_priv *priv, bool state)
1934 {
1935         wiphy_rfkill_set_hw_state(priv->hw->wiphy, state);
1936 }
1937
1938 void iwl_nic_config(struct iwl_priv *priv)
1939 {
1940         priv->cfg->lib->nic_config(priv);
1941
1942 }
1943
1944 void iwl_free_skb(struct iwl_priv *priv, struct sk_buff *skb)
1945 {
1946         struct ieee80211_tx_info *info;
1947
1948         info = IEEE80211_SKB_CB(skb);
1949         kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
1950         dev_kfree_skb_any(skb);
1951 }
1952
1953 void iwl_stop_sw_queue(struct iwl_priv *priv, u8 ac)
1954 {
1955         ieee80211_stop_queue(priv->hw, ac);
1956 }
1957
1958 void iwl_wake_sw_queue(struct iwl_priv *priv, u8 ac)
1959 {
1960         ieee80211_wake_queue(priv->hw, ac);
1961 }