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

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *****************************************************************************/
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/etherdevice.h>
  32 #include <linux/sched.h>
  33 #include <linux/slab.h>
  34 #include <net/mac80211.h>
  35
  36 #include "iwl-eeprom.h"
  37 #include "iwl-dev.h"
  38 #include "iwl-debug.h"
  39 #include "iwl-core.h"
  40 #include "iwl-io.h"
  41 #include "iwl-power.h"
  42 #include "iwl-sta.h"
  43 #include "iwl-helpers.h"
  44
  45
  46 MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
  47 MODULE_VERSION(IWLWIFI_VERSION);
  48 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  49 MODULE_LICENSE("GPL");
  50
  51 /*
  52  * set bt_coex_active to true, uCode will do kill/defer
  53  * every time the priority line is asserted (BT is sending signals on the
  54  * priority line in the PCIx).
  55  * set bt_coex_active to false, uCode will ignore the BT activity and
  56  * perform the normal operation
  57  *
  58  * User might experience transmit issue on some platform due to WiFi/BT
  59  * co-exist problem. The possible behaviors are:
  60  *   Able to scan and finding all the available AP
  61  *   Not able to associate with any AP
  62  * On those platforms, WiFi communication can be restored by set
  63  * "bt_coex_active" module parameter to "false"
  64  *
  65  * default: bt_coex_active = true (BT_COEX_ENABLE)
  66  */
  67 static bool bt_coex_active = true;
  68 module_param(bt_coex_active, bool, S_IRUGO);
  69 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
  70
  71 u32 iwlegacy_debug_level;
  72 EXPORT_SYMBOL(iwlegacy_debug_level);
  73
  74 const u8 iwlegacy_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
  75 EXPORT_SYMBOL(iwlegacy_bcast_addr);
  76
  77
  78 /* This function both allocates and initializes hw and priv. */
  79 struct ieee80211_hw *iwl_legacy_alloc_all(struct iwl_cfg *cfg)
  80 {
  81         struct iwl_priv *priv;
  82         /* mac80211 allocates memory for this device instance, including
  83          *   space for this driver's private structure */
  84         struct ieee80211_hw *hw;
  85
  86         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv),
  87                                 cfg->ops->ieee80211_ops);
  88         if (hw == NULL) {
  89                 pr_err("%s: Can not allocate network device\n",
  90                        cfg->name);
  91                 goto out;
  92         }
  93
  94         priv = hw->priv;
  95         priv->hw = hw;
  96
  97 out:
  98         return hw;
  99 }
 100 EXPORT_SYMBOL(iwl_legacy_alloc_all);
 101
 102 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 103 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 104 static void iwl_legacy_init_ht_hw_capab(const struct iwl_priv *priv,
 105                               struct ieee80211_sta_ht_cap *ht_info,
 106                               enum ieee80211_band band)
 107 {
 108         u16 max_bit_rate = 0;
 109         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 110         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 111
 112         ht_info->cap = 0;
 113         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 114
 115         ht_info->ht_supported = true;
 116
 117         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 118         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 119         if (priv->hw_params.ht40_channel & BIT(band)) {
 120                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 121                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 122                 ht_info->mcs.rx_mask[4] = 0x01;
 123                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 124         }
 125
 126         if (priv->cfg->mod_params->amsdu_size_8K)
 127                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 128
 129         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 130         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 131
 132         ht_info->mcs.rx_mask[0] = 0xFF;
 133         if (rx_chains_num >= 2)
 134                 ht_info->mcs.rx_mask[1] = 0xFF;
 135         if (rx_chains_num >= 3)
 136                 ht_info->mcs.rx_mask[2] = 0xFF;
 137
 138         /* Highest supported Rx data rate */
 139         max_bit_rate *= rx_chains_num;
 140         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 141         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 142
 143         /* Tx MCS capabilities */
 144         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 145         if (tx_chains_num != rx_chains_num) {
 146                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 147                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 148                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 149         }
 150 }
 151
 152 /**
 153  * iwl_legacy_init_geos - Initialize mac80211's geo/channel info based from eeprom
 154  */
 155 int iwl_legacy_init_geos(struct iwl_priv *priv)
 156 {
 157         struct iwl_channel_info *ch;
 158         struct ieee80211_supported_band *sband;
 159         struct ieee80211_channel *channels;
 160         struct ieee80211_channel *geo_ch;
 161         struct ieee80211_rate *rates;
 162         int i = 0;
 163         s8 max_tx_power = 0;
 164
 165         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 166             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 167                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 168                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 169                 return 0;
 170         }
 171
 172         channels = kzalloc(sizeof(struct ieee80211_channel) *
 173                            priv->channel_count, GFP_KERNEL);
 174         if (!channels)
 175                 return -ENOMEM;
 176
 177         rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
 178                         GFP_KERNEL);
 179         if (!rates) {
 180                 kfree(channels);
 181                 return -ENOMEM;
 182         }
 183
 184         /* 5.2GHz channels start after the 2.4GHz channels */
 185         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 186         sband->channels = &channels[ARRAY_SIZE(iwlegacy_eeprom_band_1)];
 187         /* just OFDM */
 188         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 189         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
 190
 191         if (priv->cfg->sku & IWL_SKU_N)
 192                 iwl_legacy_init_ht_hw_capab(priv, &sband->ht_cap,
 193                                          IEEE80211_BAND_5GHZ);
 194
 195         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 196         sband->channels = channels;
 197         /* OFDM & CCK */
 198         sband->bitrates = rates;
 199         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
 200
 201         if (priv->cfg->sku & IWL_SKU_N)
 202                 iwl_legacy_init_ht_hw_capab(priv, &sband->ht_cap,
 203                                          IEEE80211_BAND_2GHZ);
 204
 205         priv->ieee_channels = channels;
 206         priv->ieee_rates = rates;
 207
 208         for (i = 0;  i < priv->channel_count; i++) {
 209                 ch = &priv->channel_info[i];
 210
 211                 if (!iwl_legacy_is_channel_valid(ch))
 212                         continue;
 213
 214                 sband = &priv->bands[ch->band];
 215
 216                 geo_ch = &sband->channels[sband->n_channels++];
 217
 218                 geo_ch->center_freq =
 219                         ieee80211_channel_to_frequency(ch->channel, ch->band);
 220                 geo_ch->max_power = ch->max_power_avg;
 221                 geo_ch->max_antenna_gain = 0xff;
 222                 geo_ch->hw_value = ch->channel;
 223
 224                 if (iwl_legacy_is_channel_valid(ch)) {
 225                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 226                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 227
 228                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 229                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 230
 231                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 232                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 233
 234                         geo_ch->flags |= ch->ht40_extension_channel;
 235
 236                         if (ch->max_power_avg > max_tx_power)
 237                                 max_tx_power = ch->max_power_avg;
 238                 } else {
 239                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 240                 }
 241
 242                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 243                                 ch->channel, geo_ch->center_freq,
 244                                 iwl_legacy_is_channel_a_band(ch) ?  "5.2" : "2.4",
 245                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 246                                 "restricted" : "valid",
 247                                  geo_ch->flags);
 248         }
 249
 250         priv->tx_power_device_lmt = max_tx_power;
 251         priv->tx_power_user_lmt = max_tx_power;
 252         priv->tx_power_next = max_tx_power;
 253
 254         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 255              priv->cfg->sku & IWL_SKU_A) {
 256                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 257                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 258                            priv->pci_dev->device,
 259                            priv->pci_dev->subsystem_device);
 260                 priv->cfg->sku &= ~IWL_SKU_A;
 261         }
 262
 263         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 264                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 265                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 266
 267         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 268
 269         return 0;
 270 }
 271 EXPORT_SYMBOL(iwl_legacy_init_geos);
 272
 273 /*
 274  * iwl_legacy_free_geos - undo allocations in iwl_legacy_init_geos
 275  */
 276 void iwl_legacy_free_geos(struct iwl_priv *priv)
 277 {
 278         kfree(priv->ieee_channels);
 279         kfree(priv->ieee_rates);
 280         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 281 }
 282 EXPORT_SYMBOL(iwl_legacy_free_geos);
 283
 284 static bool iwl_legacy_is_channel_extension(struct iwl_priv *priv,
 285                                      enum ieee80211_band band,
 286                                      u16 channel, u8 extension_chan_offset)
 287 {
 288         const struct iwl_channel_info *ch_info;
 289
 290         ch_info = iwl_legacy_get_channel_info(priv, band, channel);
 291         if (!iwl_legacy_is_channel_valid(ch_info))
 292                 return false;
 293
 294         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 295                 return !(ch_info->ht40_extension_channel &
 296                                         IEEE80211_CHAN_NO_HT40PLUS);
 297         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 298                 return !(ch_info->ht40_extension_channel &
 299                                         IEEE80211_CHAN_NO_HT40MINUS);
 300
 301         return false;
 302 }
 303
 304 bool iwl_legacy_is_ht40_tx_allowed(struct iwl_priv *priv,
 305                             struct iwl_rxon_context *ctx,
 306                             struct ieee80211_sta_ht_cap *ht_cap)
 307 {
 308         if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
 309                 return false;
 310
 311         /*
 312          * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
 313          * the bit will not set if it is pure 40MHz case
 314          */
 315         if (ht_cap && !ht_cap->ht_supported)
 316                 return false;
 317
 318 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
 319         if (priv->disable_ht40)
 320                 return false;
 321 #endif
 322
 323         return iwl_legacy_is_channel_extension(priv, priv->band,
 324                         le16_to_cpu(ctx->staging.channel),
 325                         ctx->ht.extension_chan_offset);
 326 }
 327 EXPORT_SYMBOL(iwl_legacy_is_ht40_tx_allowed);
 328
 329 static u16 iwl_legacy_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 330 {
 331         u16 new_val;
 332         u16 beacon_factor;
 333
 334         /*
 335          * If mac80211 hasn't given us a beacon interval, program
 336          * the default into the device.
 337          */
 338         if (!beacon_val)
 339                 return DEFAULT_BEACON_INTERVAL;
 340
 341         /*
 342          * If the beacon interval we obtained from the peer
 343          * is too large, we'll have to wake up more often
 344          * (and in IBSS case, we'll beacon too much)
 345          *
 346          * For example, if max_beacon_val is 4096, and the
 347          * requested beacon interval is 7000, we'll have to
 348          * use 3500 to be able to wake up on the beacons.
 349          *
 350          * This could badly influence beacon detection stats.
 351          */
 352
 353         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 354         new_val = beacon_val / beacon_factor;
 355
 356         if (!new_val)
 357                 new_val = max_beacon_val;
 358
 359         return new_val;
 360 }
 361
 362 int
 363 iwl_legacy_send_rxon_timing(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 364 {
 365         u64 tsf;
 366         s32 interval_tm, rem;
 367         struct ieee80211_conf *conf = NULL;
 368         u16 beacon_int;
 369         struct ieee80211_vif *vif = ctx->vif;
 370
 371         conf = iwl_legacy_ieee80211_get_hw_conf(priv->hw);
 372
 373         lockdep_assert_held(&priv->mutex);
 374
 375         memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));
 376
 377         ctx->timing.timestamp = cpu_to_le64(priv->timestamp);
 378         ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);
 379
 380         beacon_int = vif ? vif->bss_conf.beacon_int : 0;
 381
 382         /*
 383          * TODO: For IBSS we need to get atim_window from mac80211,
 384          *       for now just always use 0
 385          */
 386         ctx->timing.atim_window = 0;
 387
 388         beacon_int = iwl_legacy_adjust_beacon_interval(beacon_int,
 389                         priv->hw_params.max_beacon_itrvl * TIME_UNIT);
 390         ctx->timing.beacon_interval = cpu_to_le16(beacon_int);
 391
 392         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 393         interval_tm = beacon_int * TIME_UNIT;
 394         rem = do_div(tsf, interval_tm);
 395         ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 396
 397         ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;
 398
 399         IWL_DEBUG_ASSOC(priv,
 400                         "beacon interval %d beacon timer %d beacon tim %d\n",
 401                         le16_to_cpu(ctx->timing.beacon_interval),
 402                         le32_to_cpu(ctx->timing.beacon_init_val),
 403                         le16_to_cpu(ctx->timing.atim_window));
 404
 405         return iwl_legacy_send_cmd_pdu(priv, ctx->rxon_timing_cmd,
 406                                 sizeof(ctx->timing), &ctx->timing);
 407 }
 408 EXPORT_SYMBOL(iwl_legacy_send_rxon_timing);
 409
 410 void
 411 iwl_legacy_set_rxon_hwcrypto(struct iwl_priv *priv,
 412                                 struct iwl_rxon_context *ctx,
 413                                 int hw_decrypt)
 414 {
 415         struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
 416
 417         if (hw_decrypt)
 418                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 419         else
 420                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 421
 422 }
 423 EXPORT_SYMBOL(iwl_legacy_set_rxon_hwcrypto);
 424
 425 /* validate RXON structure is valid */
 426 int
 427 iwl_legacy_check_rxon_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 428 {
 429         struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
 430         bool error = false;
 431
 432         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 433                 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
 434                         IWL_WARN(priv, "check 2.4G: wrong narrow\n");
 435                         error = true;
 436                 }
 437                 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
 438                         IWL_WARN(priv, "check 2.4G: wrong radar\n");
 439                         error = true;
 440                 }
 441         } else {
 442                 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
 443                         IWL_WARN(priv, "check 5.2G: not short slot!\n");
 444                         error = true;
 445                 }
 446                 if (rxon->flags & RXON_FLG_CCK_MSK) {
 447                         IWL_WARN(priv, "check 5.2G: CCK!\n");
 448                         error = true;
 449                 }
 450         }
 451         if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
 452                 IWL_WARN(priv, "mac/bssid mcast!\n");
 453                 error = true;
 454         }
 455
 456         /* make sure basic rates 6Mbps and 1Mbps are supported */
 457         if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&
 458             (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {
 459                 IWL_WARN(priv, "neither 1 nor 6 are basic\n");
 460                 error = true;
 461         }
 462
 463         if (le16_to_cpu(rxon->assoc_id) > 2007) {
 464                 IWL_WARN(priv, "aid > 2007\n");
 465                 error = true;
 466         }
 467
 468         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 469                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
 470                 IWL_WARN(priv, "CCK and short slot\n");
 471                 error = true;
 472         }
 473
 474         if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 475                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
 476                 IWL_WARN(priv, "CCK and auto detect");
 477                 error = true;
 478         }
 479
 480         if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 481                             RXON_FLG_TGG_PROTECT_MSK)) ==
 482                             RXON_FLG_TGG_PROTECT_MSK) {
 483                 IWL_WARN(priv, "TGg but no auto-detect\n");
 484                 error = true;
 485         }
 486
 487         if (error)
 488                 IWL_WARN(priv, "Tuning to channel %d\n",
 489                             le16_to_cpu(rxon->channel));
 490
 491         if (error) {
 492                 IWL_ERR(priv, "Invalid RXON\n");
 493                 return -EINVAL;
 494         }
 495         return 0;
 496 }
 497 EXPORT_SYMBOL(iwl_legacy_check_rxon_cmd);
 498
 499 /**
 500  * iwl_legacy_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 501  * @priv: staging_rxon is compared to active_rxon
 502  *
 503  * If the RXON structure is changing enough to require a new tune,
 504  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 505  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 506  */
 507 int iwl_legacy_full_rxon_required(struct iwl_priv *priv,
 508                            struct iwl_rxon_context *ctx)
 509 {
 510         const struct iwl_legacy_rxon_cmd *staging = &ctx->staging;
 511         const struct iwl_legacy_rxon_cmd *active = &ctx->active;
 512
 513 #define CHK(cond)                                                       \
 514         if ((cond)) {                                                   \
 515                 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n");   \
 516                 return 1;                                               \
 517         }
 518
 519 #define CHK_NEQ(c1, c2)                                         \
 520         if ((c1) != (c2)) {                                     \
 521                 IWL_DEBUG_INFO(priv, "need full RXON - "        \
 522                                #c1 " != " #c2 " - %d != %d\n",  \
 523                                (c1), (c2));                     \
 524                 return 1;                                       \
 525         }
 526
 527         /* These items are only settable from the full RXON command */
 528         CHK(!iwl_legacy_is_associated_ctx(ctx));
 529         CHK(compare_ether_addr(staging->bssid_addr, active->bssid_addr));
 530         CHK(compare_ether_addr(staging->node_addr, active->node_addr));
 531         CHK(compare_ether_addr(staging->wlap_bssid_addr,
 532                                 active->wlap_bssid_addr));
 533         CHK_NEQ(staging->dev_type, active->dev_type);
 534         CHK_NEQ(staging->channel, active->channel);
 535         CHK_NEQ(staging->air_propagation, active->air_propagation);
 536         CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
 537                 active->ofdm_ht_single_stream_basic_rates);
 538         CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
 539                 active->ofdm_ht_dual_stream_basic_rates);
 540         CHK_NEQ(staging->assoc_id, active->assoc_id);
 541
 542         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 543          * be updated with the RXON_ASSOC command -- however only some
 544          * flag transitions are allowed using RXON_ASSOC */
 545
 546         /* Check if we are not switching bands */
 547         CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
 548                 active->flags & RXON_FLG_BAND_24G_MSK);
 549
 550         /* Check if we are switching association toggle */
 551         CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
 552                 active->filter_flags & RXON_FILTER_ASSOC_MSK);
 553
 554 #undef CHK
 555 #undef CHK_NEQ
 556
 557         return 0;
 558 }
 559 EXPORT_SYMBOL(iwl_legacy_full_rxon_required);
 560
 561 u8 iwl_legacy_get_lowest_plcp(struct iwl_priv *priv,
 562                             struct iwl_rxon_context *ctx)
 563 {
 564         /*
 565          * Assign the lowest rate -- should really get this from
 566          * the beacon skb from mac80211.
 567          */
 568         if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK)
 569                 return IWL_RATE_1M_PLCP;
 570         else
 571                 return IWL_RATE_6M_PLCP;
 572 }
 573 EXPORT_SYMBOL(iwl_legacy_get_lowest_plcp);
 574
 575 static void _iwl_legacy_set_rxon_ht(struct iwl_priv *priv,
 576                              struct iwl_ht_config *ht_conf,
 577                              struct iwl_rxon_context *ctx)
 578 {
 579         struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
 580
 581         if (!ctx->ht.enabled) {
 582                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 583                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 584                         RXON_FLG_HT40_PROT_MSK |
 585                         RXON_FLG_HT_PROT_MSK);
 586                 return;
 587         }
 588
 589         rxon->flags |= cpu_to_le32(ctx->ht.protection <<
 590                                         RXON_FLG_HT_OPERATING_MODE_POS);
 591
 592         /* Set up channel bandwidth:
 593          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 594         /* clear the HT channel mode before set the mode */
 595         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 596                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 597         if (iwl_legacy_is_ht40_tx_allowed(priv, ctx, NULL)) {
 598                 /* pure ht40 */
 599                 if (ctx->ht.protection ==
 600                                 IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 601                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 602                         /* Note: control channel is opposite of extension channel */
 603                         switch (ctx->ht.extension_chan_offset) {
 604                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 605                                 rxon->flags &=
 606                                         ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 607                                 break;
 608                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 609                                 rxon->flags |=
 610                                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 611                                 break;
 612                         }
 613                 } else {
 614                         /* Note: control channel is opposite of extension channel */
 615                         switch (ctx->ht.extension_chan_offset) {
 616                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 617                                 rxon->flags &=
 618                                         ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 619                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 620                                 break;
 621                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 622                                 rxon->flags |=
 623                                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 624                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 625                                 break;
 626                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 627                         default:
 628                                 /* channel location only valid if in Mixed mode */
 629                                 IWL_ERR(priv,
 630                                         "invalid extension channel offset\n");
 631                                 break;
 632                         }
 633                 }
 634         } else {
 635                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 636         }
 637
 638         if (priv->cfg->ops->hcmd->set_rxon_chain)
 639                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
 640
 641         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 642                         "extension channel offset 0x%x\n",
 643                         le32_to_cpu(rxon->flags), ctx->ht.protection,
 644                         ctx->ht.extension_chan_offset);
 645 }
 646
 647 void iwl_legacy_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 648 {
 649         struct iwl_rxon_context *ctx;
 650
 651         for_each_context(priv, ctx)
 652                 _iwl_legacy_set_rxon_ht(priv, ht_conf, ctx);
 653 }
 654 EXPORT_SYMBOL(iwl_legacy_set_rxon_ht);
 655
 656 /* Return valid, unused, channel for a passive scan to reset the RF */
 657 u8 iwl_legacy_get_single_channel_number(struct iwl_priv *priv,
 658                                  enum ieee80211_band band)
 659 {
 660         const struct iwl_channel_info *ch_info;
 661         int i;
 662         u8 channel = 0;
 663         u8 min, max;
 664         struct iwl_rxon_context *ctx;
 665
 666         if (band == IEEE80211_BAND_5GHZ) {
 667                 min = 14;
 668                 max = priv->channel_count;
 669         } else {
 670                 min = 0;
 671                 max = 14;
 672         }
 673
 674         for (i = min; i < max; i++) {
 675                 bool busy = false;
 676
 677                 for_each_context(priv, ctx) {
 678                         busy = priv->channel_info[i].channel ==
 679                                 le16_to_cpu(ctx->staging.channel);
 680                         if (busy)
 681                                 break;
 682                 }
 683
 684                 if (busy)
 685                         continue;
 686
 687                 channel = priv->channel_info[i].channel;
 688                 ch_info = iwl_legacy_get_channel_info(priv, band, channel);
 689                 if (iwl_legacy_is_channel_valid(ch_info))
 690                         break;
 691         }
 692
 693         return channel;
 694 }
 695 EXPORT_SYMBOL(iwl_legacy_get_single_channel_number);
 696
 697 /**
 698  * iwl_legacy_set_rxon_channel - Set the band and channel values in staging RXON
 699  * @ch: requested channel as a pointer to struct ieee80211_channel
 700
 701  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 702  * in the staging RXON flag structure based on the ch->band
 703  */
 704 int
 705 iwl_legacy_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
 706                          struct iwl_rxon_context *ctx)
 707 {
 708         enum ieee80211_band band = ch->band;
 709         u16 channel = ch->hw_value;
 710
 711         if ((le16_to_cpu(ctx->staging.channel) == channel) &&
 712             (priv->band == band))
 713                 return 0;
 714
 715         ctx->staging.channel = cpu_to_le16(channel);
 716         if (band == IEEE80211_BAND_5GHZ)
 717                 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
 718         else
 719                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
 720
 721         priv->band = band;
 722
 723         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 724
 725         return 0;
 726 }
 727 EXPORT_SYMBOL(iwl_legacy_set_rxon_channel);
 728
 729 void iwl_legacy_set_flags_for_band(struct iwl_priv *priv,
 730                             struct iwl_rxon_context *ctx,
 731                             enum ieee80211_band band,
 732                             struct ieee80211_vif *vif)
 733 {
 734         if (band == IEEE80211_BAND_5GHZ) {
 735                 ctx->staging.flags &=
 736                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 737                       | RXON_FLG_CCK_MSK);
 738                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 739         } else {
 740                 /* Copied from iwl_post_associate() */
 741                 if (vif && vif->bss_conf.use_short_slot)
 742                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 743                 else
 744                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 745
 746                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
 747                 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
 748                 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
 749         }
 750 }
 751 EXPORT_SYMBOL(iwl_legacy_set_flags_for_band);
 752
 753 /*
 754  * initialize rxon structure with default values from eeprom
 755  */
 756 void iwl_legacy_connection_init_rx_config(struct iwl_priv *priv,
 757                                    struct iwl_rxon_context *ctx)
 758 {
 759         const struct iwl_channel_info *ch_info;
 760
 761         memset(&ctx->staging, 0, sizeof(ctx->staging));
 762
 763         if (!ctx->vif) {
 764                 ctx->staging.dev_type = ctx->unused_devtype;
 765         } else
 766         switch (ctx->vif->type) {
 767
 768         case NL80211_IFTYPE_STATION:
 769                 ctx->staging.dev_type = ctx->station_devtype;
 770                 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
 771                 break;
 772
 773         case NL80211_IFTYPE_ADHOC:
 774                 ctx->staging.dev_type = ctx->ibss_devtype;
 775                 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
 776                 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
 777                                                   RXON_FILTER_ACCEPT_GRP_MSK;
 778                 break;
 779
 780         default:
 781                 IWL_ERR(priv, "Unsupported interface type %d\n",
 782                         ctx->vif->type);
 783                 break;
 784         }
 785
 786 #if 0
 787         /* TODO:  Figure out when short_preamble would be set and cache from
 788          * that */
 789         if (!hw_to_local(priv->hw)->short_preamble)
 790                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
 791         else
 792                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
 793 #endif
 794
 795         ch_info = iwl_legacy_get_channel_info(priv, priv->band,
 796                                        le16_to_cpu(ctx->active.channel));
 797
 798         if (!ch_info)
 799                 ch_info = &priv->channel_info[0];
 800
 801         ctx->staging.channel = cpu_to_le16(ch_info->channel);
 802         priv->band = ch_info->band;
 803
 804         iwl_legacy_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
 805
 806         ctx->staging.ofdm_basic_rates =
 807             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
 808         ctx->staging.cck_basic_rates =
 809             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
 810
 811         /* clear both MIX and PURE40 mode flag */
 812         ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
 813                                         RXON_FLG_CHANNEL_MODE_PURE_40);
 814         if (ctx->vif)
 815                 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
 816
 817         ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
 818         ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
 819 }
 820 EXPORT_SYMBOL(iwl_legacy_connection_init_rx_config);
 821
 822 void iwl_legacy_set_rate(struct iwl_priv *priv)
 823 {
 824         const struct ieee80211_supported_band *hw = NULL;
 825         struct ieee80211_rate *rate;
 826         struct iwl_rxon_context *ctx;
 827         int i;
 828
 829         hw = iwl_get_hw_mode(priv, priv->band);
 830         if (!hw) {
 831                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
 832                 return;
 833         }
 834
 835         priv->active_rate = 0;
 836
 837         for (i = 0; i < hw->n_bitrates; i++) {
 838                 rate = &(hw->bitrates[i]);
 839                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
 840                         priv->active_rate |= (1 << rate->hw_value);
 841         }
 842
 843         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
 844
 845         for_each_context(priv, ctx) {
 846                 ctx->staging.cck_basic_rates =
 847                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
 848
 849                 ctx->staging.ofdm_basic_rates =
 850                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
 851         }
 852 }
 853 EXPORT_SYMBOL(iwl_legacy_set_rate);
 854
 855 void iwl_legacy_chswitch_done(struct iwl_priv *priv, bool is_success)
 856 {
 857         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 858
 859         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 860                 return;
 861
 862         if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 863                 ieee80211_chswitch_done(ctx->vif, is_success);
 864 }
 865 EXPORT_SYMBOL(iwl_legacy_chswitch_done);
 866
 867 void iwl_legacy_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
 868 {
 869         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 870         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
 871
 872         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 873         struct iwl_legacy_rxon_cmd *rxon = (void *)&ctx->active;
 874
 875         if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 876                 return;
 877
 878         if (!le32_to_cpu(csa->status) && csa->channel == priv->switch_channel) {
 879                 rxon->channel = csa->channel;
 880                 ctx->staging.channel = csa->channel;
 881                 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
 882                               le16_to_cpu(csa->channel));
 883                 iwl_legacy_chswitch_done(priv, true);
 884         } else {
 885                 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
 886                         le16_to_cpu(csa->channel));
 887                 iwl_legacy_chswitch_done(priv, false);
 888         }
 889 }
 890 EXPORT_SYMBOL(iwl_legacy_rx_csa);
 891
 892 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
 893 void iwl_legacy_print_rx_config_cmd(struct iwl_priv *priv,
 894                              struct iwl_rxon_context *ctx)
 895 {
 896         struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
 897
 898         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
 899         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
 900         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",
 901                                 le16_to_cpu(rxon->channel));
 902         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
 903         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
 904                                 le32_to_cpu(rxon->filter_flags));
 905         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
 906         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
 907                         rxon->ofdm_basic_rates);
 908         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",
 909                                 rxon->cck_basic_rates);
 910         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
 911         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
 912         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",
 913                                 le16_to_cpu(rxon->assoc_id));
 914 }
 915 EXPORT_SYMBOL(iwl_legacy_print_rx_config_cmd);
 916 #endif
 917 /**
 918  * iwl_legacy_irq_handle_error - called for HW or SW error interrupt from card
 919  */
 920 void iwl_legacy_irq_handle_error(struct iwl_priv *priv)
 921 {
 922         /* Set the FW error flag -- cleared on iwl_down */
 923         set_bit(STATUS_FW_ERROR, &priv->status);
 924
 925         /* Cancel currently queued command. */
 926         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 927
 928         IWL_ERR(priv, "Loaded firmware version: %s\n",
 929                 priv->hw->wiphy->fw_version);
 930
 931         priv->cfg->ops->lib->dump_nic_error_log(priv);
 932         if (priv->cfg->ops->lib->dump_fh)
 933                 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
 934         priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
 935 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
 936         if (iwl_legacy_get_debug_level(priv) & IWL_DL_FW_ERRORS)
 937                 iwl_legacy_print_rx_config_cmd(priv,
 938                                         &priv->contexts[IWL_RXON_CTX_BSS]);
 939 #endif
 940
 941         wake_up_interruptible(&priv->wait_command_queue);
 942
 943         /* Keep the restart process from trying to send host
 944          * commands by clearing the INIT status bit */
 945         clear_bit(STATUS_READY, &priv->status);
 946
 947         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 948                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
 949                           "Restarting adapter due to uCode error.\n");
 950
 951                 if (priv->cfg->mod_params->restart_fw)
 952                         queue_work(priv->workqueue, &priv->restart);
 953         }
 954 }
 955 EXPORT_SYMBOL(iwl_legacy_irq_handle_error);
 956
 957 static int iwl_legacy_apm_stop_master(struct iwl_priv *priv)
 958 {
 959         int ret = 0;
 960
 961         /* stop device's busmaster DMA activity */
 962         iwl_legacy_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 963
 964         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
 965                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 966         if (ret)
 967                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
 968
 969         IWL_DEBUG_INFO(priv, "stop master\n");
 970
 971         return ret;
 972 }
 973
 974 void iwl_legacy_apm_stop(struct iwl_priv *priv)
 975 {
 976         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
 977
 978         /* Stop device's DMA activity */
 979         iwl_legacy_apm_stop_master(priv);
 980
 981         /* Reset the entire device */
 982         iwl_legacy_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 983
 984         udelay(10);
 985
 986         /*
 987          * Clear "initialization complete" bit to move adapter from
 988          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
 989          */
 990         iwl_legacy_clear_bit(priv, CSR_GP_CNTRL,
 991                                 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 992 }
 993 EXPORT_SYMBOL(iwl_legacy_apm_stop);
 994
 995
 996 /*
 997  * Start up NIC's basic functionality after it has been reset
 998  * (e.g. after platform boot, or shutdown via iwl_legacy_apm_stop())
 999  * NOTE:  This does not load uCode nor start the embedded processor
1000  */
1001 int iwl_legacy_apm_init(struct iwl_priv *priv)
1002 {
1003         int ret = 0;
1004         u16 lctl;
1005
1006         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1007
1008         /*
1009          * Use "set_bit" below rather than "write", to preserve any hardware
1010          * bits already set by default after reset.
1011          */
1012
1013         /* Disable L0S exit timer (platform NMI Work/Around) */
1014         iwl_legacy_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1015                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1016
1017         /*
1018          * Disable L0s without affecting L1;
1019          *  don't wait for ICH L0s (ICH bug W/A)
1020          */
1021         iwl_legacy_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1022                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1023
1024         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1025         iwl_legacy_set_bit(priv, CSR_DBG_HPET_MEM_REG,
1026                                         CSR_DBG_HPET_MEM_REG_VAL);
1027
1028         /*
1029          * Enable HAP INTA (interrupt from management bus) to
1030          * wake device's PCI Express link L1a -> L0s
1031          * NOTE:  This is no-op for 3945 (non-existent bit)
1032          */
1033         iwl_legacy_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1034                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1035
1036         /*
1037          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1038          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1039          * If so (likely), disable L0S, so device moves directly L0->L1;
1040          *    costs negligible amount of power savings.
1041          * If not (unlikely), enable L0S, so there is at least some
1042          *    power savings, even without L1.
1043          */
1044         if (priv->cfg->base_params->set_l0s) {
1045                 lctl = iwl_legacy_pcie_link_ctl(priv);
1046                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1047                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1048                         /* L1-ASPM enabled; disable(!) L0S  */
1049                         iwl_legacy_set_bit(priv, CSR_GIO_REG,
1050                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1051                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1052                 } else {
1053                         /* L1-ASPM disabled; enable(!) L0S */
1054                         iwl_legacy_clear_bit(priv, CSR_GIO_REG,
1055                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1056                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1057                 }
1058         }
1059
1060         /* Configure analog phase-lock-loop before activating to D0A */
1061         if (priv->cfg->base_params->pll_cfg_val)
1062                 iwl_legacy_set_bit(priv, CSR_ANA_PLL_CFG,
1063                             priv->cfg->base_params->pll_cfg_val);
1064
1065         /*
1066          * Set "initialization complete" bit to move adapter from
1067          * D0U* --> D0A* (powered-up active) state.
1068          */
1069         iwl_legacy_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1070
1071         /*
1072          * Wait for clock stabilization; once stabilized, access to
1073          * device-internal resources is supported, e.g. iwl_legacy_write_prph()
1074          * and accesses to uCode SRAM.
1075          */
1076         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1077                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1078                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1079         if (ret < 0) {
1080                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1081                 goto out;
1082         }
1083
1084         /*
1085          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1086          * BSM (Boostrap State Machine) is only in 3945 and 4965.
1087          *
1088          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1089          * do not disable clocks.  This preserves any hardware bits already
1090          * set by default in "CLK_CTRL_REG" after reset.
1091          */
1092         if (priv->cfg->base_params->use_bsm)
1093                 iwl_legacy_write_prph(priv, APMG_CLK_EN_REG,
1094                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1095         else
1096                 iwl_legacy_write_prph(priv, APMG_CLK_EN_REG,
1097                         APMG_CLK_VAL_DMA_CLK_RQT);
1098         udelay(20);
1099
1100         /* Disable L1-Active */
1101         iwl_legacy_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1102                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1103
1104 out:
1105         return ret;
1106 }
1107 EXPORT_SYMBOL(iwl_legacy_apm_init);
1108
1109
1110 int iwl_legacy_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1111 {
1112         int ret;
1113         s8 prev_tx_power;
1114         bool defer;
1115         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1116
1117         lockdep_assert_held(&priv->mutex);
1118
1119         if (priv->tx_power_user_lmt == tx_power && !force)
1120                 return 0;
1121
1122         if (!priv->cfg->ops->lib->send_tx_power)
1123                 return -EOPNOTSUPP;
1124
1125         /* 0 dBm mean 1 milliwatt */
1126         if (tx_power < 0) {
1127                 IWL_WARN(priv,
1128                          "Requested user TXPOWER %d below 1 mW.\n",
1129                          tx_power);
1130                 return -EINVAL;
1131         }
1132
1133         if (tx_power > priv->tx_power_device_lmt) {
1134                 IWL_WARN(priv,
1135                         "Requested user TXPOWER %d above upper limit %d.\n",
1136                          tx_power, priv->tx_power_device_lmt);
1137                 return -EINVAL;
1138         }
1139
1140         if (!iwl_legacy_is_ready_rf(priv))
1141                 return -EIO;
1142
1143         /* scan complete and commit_rxon use tx_power_next value,
1144          * it always need to be updated for newest request */
1145         priv->tx_power_next = tx_power;
1146
1147         /* do not set tx power when scanning or channel changing */
1148         defer = test_bit(STATUS_SCANNING, &priv->status) ||
1149                 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
1150         if (defer && !force) {
1151                 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
1152                 return 0;
1153         }
1154
1155         prev_tx_power = priv->tx_power_user_lmt;
1156         priv->tx_power_user_lmt = tx_power;
1157
1158         ret = priv->cfg->ops->lib->send_tx_power(priv);
1159
1160         /* if fail to set tx_power, restore the orig. tx power */
1161         if (ret) {
1162                 priv->tx_power_user_lmt = prev_tx_power;
1163                 priv->tx_power_next = prev_tx_power;
1164         }
1165         return ret;
1166 }
1167 EXPORT_SYMBOL(iwl_legacy_set_tx_power);
1168
1169 void iwl_legacy_send_bt_config(struct iwl_priv *priv)
1170 {
1171         struct iwl_bt_cmd bt_cmd = {
1172                 .lead_time = BT_LEAD_TIME_DEF,
1173                 .max_kill = BT_MAX_KILL_DEF,
1174                 .kill_ack_mask = 0,
1175                 .kill_cts_mask = 0,
1176         };
1177
1178         if (!bt_coex_active)
1179                 bt_cmd.flags = BT_COEX_DISABLE;
1180         else
1181                 bt_cmd.flags = BT_COEX_ENABLE;
1182
1183         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1184                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1185
1186         if (iwl_legacy_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1187                              sizeof(struct iwl_bt_cmd), &bt_cmd))
1188                 IWL_ERR(priv, "failed to send BT Coex Config\n");
1189 }
1190 EXPORT_SYMBOL(iwl_legacy_send_bt_config);
1191
1192 int iwl_legacy_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1193 {
1194         struct iwl_statistics_cmd statistics_cmd = {
1195                 .configuration_flags =
1196                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1197         };
1198
1199         if (flags & CMD_ASYNC)
1200                 return iwl_legacy_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1201                                         sizeof(struct iwl_statistics_cmd),
1202                                         &statistics_cmd, NULL);
1203         else
1204                 return iwl_legacy_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1205                                         sizeof(struct iwl_statistics_cmd),
1206                                         &statistics_cmd);
1207 }
1208 EXPORT_SYMBOL(iwl_legacy_send_statistics_request);
1209
1210 void iwl_legacy_rx_pm_sleep_notif(struct iwl_priv *priv,
1211                            struct iwl_rx_mem_buffer *rxb)
1212 {
1213 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
1214         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1215         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1216         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1217                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1218 #endif
1219 }
1220 EXPORT_SYMBOL(iwl_legacy_rx_pm_sleep_notif);
1221
1222 void iwl_legacy_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1223                                       struct iwl_rx_mem_buffer *rxb)
1224 {
1225         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1226         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1227         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1228                         "notification for %s:\n", len,
1229                         iwl_legacy_get_cmd_string(pkt->hdr.cmd));
1230         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1231 }
1232 EXPORT_SYMBOL(iwl_legacy_rx_pm_debug_statistics_notif);
1233
1234 void iwl_legacy_rx_reply_error(struct iwl_priv *priv,
1235                         struct iwl_rx_mem_buffer *rxb)
1236 {
1237         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1238
1239         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1240                 "seq 0x%04X ser 0x%08X\n",
1241                 le32_to_cpu(pkt->u.err_resp.error_type),
1242                 iwl_legacy_get_cmd_string(pkt->u.err_resp.cmd_id),
1243                 pkt->u.err_resp.cmd_id,
1244                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1245                 le32_to_cpu(pkt->u.err_resp.error_info));
1246 }
1247 EXPORT_SYMBOL(iwl_legacy_rx_reply_error);
1248
1249 void iwl_legacy_clear_isr_stats(struct iwl_priv *priv)
1250 {
1251         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1252 }
1253
1254 int iwl_legacy_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1255                            const struct ieee80211_tx_queue_params *params)
1256 {
1257         struct iwl_priv *priv = hw->priv;
1258         struct iwl_rxon_context *ctx;
1259         unsigned long flags;
1260         int q;
1261
1262         IWL_DEBUG_MAC80211(priv, "enter\n");
1263
1264         if (!iwl_legacy_is_ready_rf(priv)) {
1265                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1266                 return -EIO;
1267         }
1268
1269         if (queue >= AC_NUM) {
1270                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1271                 return 0;
1272         }
1273
1274         q = AC_NUM - 1 - queue;
1275
1276         spin_lock_irqsave(&priv->lock, flags);
1277
1278         for_each_context(priv, ctx) {
1279                 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1280                         cpu_to_le16(params->cw_min);
1281                 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1282                         cpu_to_le16(params->cw_max);
1283                 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1284                 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1285                                 cpu_to_le16((params->txop * 32));
1286
1287                 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1288         }
1289
1290         spin_unlock_irqrestore(&priv->lock, flags);
1291
1292         IWL_DEBUG_MAC80211(priv, "leave\n");
1293         return 0;
1294 }
1295 EXPORT_SYMBOL(iwl_legacy_mac_conf_tx);
1296
1297 int iwl_legacy_mac_tx_last_beacon(struct ieee80211_hw *hw)
1298 {
1299         struct iwl_priv *priv = hw->priv;
1300
1301         return priv->ibss_manager == IWL_IBSS_MANAGER;
1302 }
1303 EXPORT_SYMBOL_GPL(iwl_legacy_mac_tx_last_beacon);
1304
1305 static int
1306 iwl_legacy_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1307 {
1308         iwl_legacy_connection_init_rx_config(priv, ctx);
1309
1310         if (priv->cfg->ops->hcmd->set_rxon_chain)
1311                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1312
1313         return iwl_legacy_commit_rxon(priv, ctx);
1314 }
1315
1316 static int iwl_legacy_setup_interface(struct iwl_priv *priv,
1317                                struct iwl_rxon_context *ctx)
1318 {
1319         struct ieee80211_vif *vif = ctx->vif;
1320         int err;
1321
1322         lockdep_assert_held(&priv->mutex);
1323
1324         /*
1325          * This variable will be correct only when there's just
1326          * a single context, but all code using it is for hardware
1327          * that supports only one context.
1328          */
1329         priv->iw_mode = vif->type;
1330
1331         ctx->is_active = true;
1332
1333         err = iwl_legacy_set_mode(priv, ctx);
1334         if (err) {
1335                 if (!ctx->always_active)
1336                         ctx->is_active = false;
1337                 return err;
1338         }
1339
1340         return 0;
1341 }
1342
1343 int
1344 iwl_legacy_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1345 {
1346         struct iwl_priv *priv = hw->priv;
1347         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1348         struct iwl_rxon_context *tmp, *ctx = NULL;
1349         int err;
1350
1351         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1352                            vif->type, vif->addr);
1353
1354         mutex_lock(&priv->mutex);
1355
1356         if (!iwl_legacy_is_ready_rf(priv)) {
1357                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1358                 err = -EINVAL;
1359                 goto out;
1360         }
1361
1362         for_each_context(priv, tmp) {
1363                 u32 possible_modes =
1364                         tmp->interface_modes | tmp->exclusive_interface_modes;
1365
1366                 if (tmp->vif) {
1367                         /* check if this busy context is exclusive */
1368                         if (tmp->exclusive_interface_modes &
1369                                                 BIT(tmp->vif->type)) {
1370                                 err = -EINVAL;
1371                                 goto out;
1372                         }
1373                         continue;
1374                 }
1375
1376                 if (!(possible_modes & BIT(vif->type)))
1377                         continue;
1378
1379                 /* have maybe usable context w/o interface */
1380                 ctx = tmp;
1381                 break;
1382         }
1383
1384         if (!ctx) {
1385                 err = -EOPNOTSUPP;
1386                 goto out;
1387         }
1388
1389         vif_priv->ctx = ctx;
1390         ctx->vif = vif;
1391
1392         err = iwl_legacy_setup_interface(priv, ctx);
1393         if (!err)
1394                 goto out;
1395
1396         ctx->vif = NULL;
1397         priv->iw_mode = NL80211_IFTYPE_STATION;
1398  out:
1399         mutex_unlock(&priv->mutex);
1400
1401         IWL_DEBUG_MAC80211(priv, "leave\n");
1402         return err;
1403 }
1404 EXPORT_SYMBOL(iwl_legacy_mac_add_interface);
1405
1406 static void iwl_legacy_teardown_interface(struct iwl_priv *priv,
1407                                    struct ieee80211_vif *vif,
1408                                    bool mode_change)
1409 {
1410         struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1411
1412         lockdep_assert_held(&priv->mutex);
1413
1414         if (priv->scan_vif == vif) {
1415                 iwl_legacy_scan_cancel_timeout(priv, 200);
1416                 iwl_legacy_force_scan_end(priv);
1417         }
1418
1419         if (!mode_change) {
1420                 iwl_legacy_set_mode(priv, ctx);
1421                 if (!ctx->always_active)
1422                         ctx->is_active = false;
1423         }
1424 }
1425
1426 void iwl_legacy_mac_remove_interface(struct ieee80211_hw *hw,
1427                               struct ieee80211_vif *vif)
1428 {
1429         struct iwl_priv *priv = hw->priv;
1430         struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1431
1432         IWL_DEBUG_MAC80211(priv, "enter\n");
1433
1434         mutex_lock(&priv->mutex);
1435
1436         WARN_ON(ctx->vif != vif);
1437         ctx->vif = NULL;
1438
1439         iwl_legacy_teardown_interface(priv, vif, false);
1440
1441         memset(priv->bssid, 0, ETH_ALEN);
1442         mutex_unlock(&priv->mutex);
1443
1444         IWL_DEBUG_MAC80211(priv, "leave\n");
1445
1446 }
1447 EXPORT_SYMBOL(iwl_legacy_mac_remove_interface);
1448
1449 int iwl_legacy_alloc_txq_mem(struct iwl_priv *priv)
1450 {
1451         if (!priv->txq)
1452                 priv->txq = kzalloc(
1453                         sizeof(struct iwl_tx_queue) *
1454                                 priv->cfg->base_params->num_of_queues,
1455                         GFP_KERNEL);
1456         if (!priv->txq) {
1457                 IWL_ERR(priv, "Not enough memory for txq\n");
1458                 return -ENOMEM;
1459         }
1460         return 0;
1461 }
1462 EXPORT_SYMBOL(iwl_legacy_alloc_txq_mem);
1463
1464 void iwl_legacy_txq_mem(struct iwl_priv *priv)
1465 {
1466         kfree(priv->txq);
1467         priv->txq = NULL;
1468 }
1469 EXPORT_SYMBOL(iwl_legacy_txq_mem);
1470
1471 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
1472
1473 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
1474
1475 void iwl_legacy_reset_traffic_log(struct iwl_priv *priv)
1476 {
1477         priv->tx_traffic_idx = 0;
1478         priv->rx_traffic_idx = 0;
1479         if (priv->tx_traffic)
1480                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1481         if (priv->rx_traffic)
1482                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1483 }
1484
1485 int iwl_legacy_alloc_traffic_mem(struct iwl_priv *priv)
1486 {
1487         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1488
1489         if (iwlegacy_debug_level & IWL_DL_TX) {
1490                 if (!priv->tx_traffic) {
1491                         priv->tx_traffic =
1492                                 kzalloc(traffic_size, GFP_KERNEL);
1493                         if (!priv->tx_traffic)
1494                                 return -ENOMEM;
1495                 }
1496         }
1497         if (iwlegacy_debug_level & IWL_DL_RX) {
1498                 if (!priv->rx_traffic) {
1499                         priv->rx_traffic =
1500                                 kzalloc(traffic_size, GFP_KERNEL);
1501                         if (!priv->rx_traffic)
1502                                 return -ENOMEM;
1503                 }
1504         }
1505         iwl_legacy_reset_traffic_log(priv);
1506         return 0;
1507 }
1508 EXPORT_SYMBOL(iwl_legacy_alloc_traffic_mem);
1509
1510 void iwl_legacy_free_traffic_mem(struct iwl_priv *priv)
1511 {
1512         kfree(priv->tx_traffic);
1513         priv->tx_traffic = NULL;
1514
1515         kfree(priv->rx_traffic);
1516         priv->rx_traffic = NULL;
1517 }
1518 EXPORT_SYMBOL(iwl_legacy_free_traffic_mem);
1519
1520 void iwl_legacy_dbg_log_tx_data_frame(struct iwl_priv *priv,
1521                       u16 length, struct ieee80211_hdr *header)
1522 {
1523         __le16 fc;
1524         u16 len;
1525
1526         if (likely(!(iwlegacy_debug_level & IWL_DL_TX)))
1527                 return;
1528
1529         if (!priv->tx_traffic)
1530                 return;
1531
1532         fc = header->frame_control;
1533         if (ieee80211_is_data(fc)) {
1534                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1535                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
1536                 memcpy((priv->tx_traffic +
1537                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1538                        header, len);
1539                 priv->tx_traffic_idx =
1540                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1541         }
1542 }
1543 EXPORT_SYMBOL(iwl_legacy_dbg_log_tx_data_frame);
1544
1545 void iwl_legacy_dbg_log_rx_data_frame(struct iwl_priv *priv,
1546                       u16 length, struct ieee80211_hdr *header)
1547 {
1548         __le16 fc;
1549         u16 len;
1550
1551         if (likely(!(iwlegacy_debug_level & IWL_DL_RX)))
1552                 return;
1553
1554         if (!priv->rx_traffic)
1555                 return;
1556
1557         fc = header->frame_control;
1558         if (ieee80211_is_data(fc)) {
1559                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1560                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
1561                 memcpy((priv->rx_traffic +
1562                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1563                        header, len);
1564                 priv->rx_traffic_idx =
1565                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1566         }
1567 }
1568 EXPORT_SYMBOL(iwl_legacy_dbg_log_rx_data_frame);
1569
1570 const char *iwl_legacy_get_mgmt_string(int cmd)
1571 {
1572         switch (cmd) {
1573                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1574                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1575                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1576                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1577                 IWL_CMD(MANAGEMENT_PROBE_REQ);
1578                 IWL_CMD(MANAGEMENT_PROBE_RESP);
1579                 IWL_CMD(MANAGEMENT_BEACON);
1580                 IWL_CMD(MANAGEMENT_ATIM);
1581                 IWL_CMD(MANAGEMENT_DISASSOC);
1582                 IWL_CMD(MANAGEMENT_AUTH);
1583                 IWL_CMD(MANAGEMENT_DEAUTH);
1584                 IWL_CMD(MANAGEMENT_ACTION);
1585         default:
1586                 return "UNKNOWN";
1587
1588         }
1589 }
1590
1591 const char *iwl_legacy_get_ctrl_string(int cmd)
1592 {
1593         switch (cmd) {
1594                 IWL_CMD(CONTROL_BACK_REQ);
1595                 IWL_CMD(CONTROL_BACK);
1596                 IWL_CMD(CONTROL_PSPOLL);
1597                 IWL_CMD(CONTROL_RTS);
1598                 IWL_CMD(CONTROL_CTS);
1599                 IWL_CMD(CONTROL_ACK);
1600                 IWL_CMD(CONTROL_CFEND);
1601                 IWL_CMD(CONTROL_CFENDACK);
1602         default:
1603                 return "UNKNOWN";
1604
1605         }
1606 }
1607
1608 void iwl_legacy_clear_traffic_stats(struct iwl_priv *priv)
1609 {
1610         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1611         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1612 }
1613
1614 /*
1615  * if CONFIG_IWLWIFI_LEGACY_DEBUGFS defined,
1616  * iwl_legacy_update_stats function will
1617  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass
1618  * Use debugFs to display the rx/rx_statistics
1619  * if CONFIG_IWLWIFI_LEGACY_DEBUGFS not being defined, then no MGMT and CTRL
1620  * information will be recorded, but DATA pkt still will be recorded
1621  * for the reason of iwl_led.c need to control the led blinking based on
1622  * number of tx and rx data.
1623  *
1624  */
1625 void
1626 iwl_legacy_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1627 {
1628         struct traffic_stats    *stats;
1629
1630         if (is_tx)
1631                 stats = &priv->tx_stats;
1632         else
1633                 stats = &priv->rx_stats;
1634
1635         if (ieee80211_is_mgmt(fc)) {
1636                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1637                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1638                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1639                         break;
1640                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1641                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1642                         break;
1643                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1644                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1645                         break;
1646                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1647                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1648                         break;
1649                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1650                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1651                         break;
1652                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1653                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1654                         break;
1655                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1656                         stats->mgmt[MANAGEMENT_BEACON]++;
1657                         break;
1658                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1659                         stats->mgmt[MANAGEMENT_ATIM]++;
1660                         break;
1661                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1662                         stats->mgmt[MANAGEMENT_DISASSOC]++;
1663                         break;
1664                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1665                         stats->mgmt[MANAGEMENT_AUTH]++;
1666                         break;
1667                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1668                         stats->mgmt[MANAGEMENT_DEAUTH]++;
1669                         break;
1670                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1671                         stats->mgmt[MANAGEMENT_ACTION]++;
1672                         break;
1673                 }
1674         } else if (ieee80211_is_ctl(fc)) {
1675                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1676                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1677                         stats->ctrl[CONTROL_BACK_REQ]++;
1678                         break;
1679                 case cpu_to_le16(IEEE80211_STYPE_BACK):
1680                         stats->ctrl[CONTROL_BACK]++;
1681                         break;
1682                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1683                         stats->ctrl[CONTROL_PSPOLL]++;
1684                         break;
1685                 case cpu_to_le16(IEEE80211_STYPE_RTS):
1686                         stats->ctrl[CONTROL_RTS]++;
1687                         break;
1688                 case cpu_to_le16(IEEE80211_STYPE_CTS):
1689                         stats->ctrl[CONTROL_CTS]++;
1690                         break;
1691                 case cpu_to_le16(IEEE80211_STYPE_ACK):
1692                         stats->ctrl[CONTROL_ACK]++;
1693                         break;
1694                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1695                         stats->ctrl[CONTROL_CFEND]++;
1696                         break;
1697                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1698                         stats->ctrl[CONTROL_CFENDACK]++;
1699                         break;
1700                 }
1701         } else {
1702                 /* data */
1703                 stats->data_cnt++;
1704                 stats->data_bytes += len;
1705         }
1706 }
1707 EXPORT_SYMBOL(iwl_legacy_update_stats);
1708 #endif
1709
1710 static void _iwl_legacy_force_rf_reset(struct iwl_priv *priv)
1711 {
1712         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1713                 return;
1714
1715         if (!iwl_legacy_is_any_associated(priv)) {
1716                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
1717                 return;
1718         }
1719         /*
1720          * There is no easy and better way to force reset the radio,
1721          * the only known method is switching channel which will force to
1722          * reset and tune the radio.
1723          * Use internal short scan (single channel) operation to should
1724          * achieve this objective.
1725          * Driver should reset the radio when number of consecutive missed
1726          * beacon, or any other uCode error condition detected.
1727          */
1728         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
1729         iwl_legacy_internal_short_hw_scan(priv);
1730 }
1731
1732
1733 int iwl_legacy_force_reset(struct iwl_priv *priv, int mode, bool external)
1734 {
1735         struct iwl_force_reset *force_reset;
1736
1737         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1738                 return -EINVAL;
1739
1740         if (mode >= IWL_MAX_FORCE_RESET) {
1741                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
1742                 return -EINVAL;
1743         }
1744         force_reset = &priv->force_reset[mode];
1745         force_reset->reset_request_count++;
1746         if (!external) {
1747                 if (force_reset->last_force_reset_jiffies &&
1748                     time_after(force_reset->last_force_reset_jiffies +
1749                     force_reset->reset_duration, jiffies)) {
1750                         IWL_DEBUG_INFO(priv, "force reset rejected\n");
1751                         force_reset->reset_reject_count++;
1752                         return -EAGAIN;
1753                 }
1754         }
1755         force_reset->reset_success_count++;
1756         force_reset->last_force_reset_jiffies = jiffies;
1757         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
1758         switch (mode) {
1759         case IWL_RF_RESET:
1760                 _iwl_legacy_force_rf_reset(priv);
1761                 break;
1762         case IWL_FW_RESET:
1763                 /*
1764                  * if the request is from external(ex: debugfs),
1765                  * then always perform the request in regardless the module
1766                  * parameter setting
1767                  * if the request is from internal (uCode error or driver
1768                  * detect failure), then fw_restart module parameter
1769                  * need to be check before performing firmware reload
1770                  */
1771                 if (!external && !priv->cfg->mod_params->restart_fw) {
1772                         IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1773                                        "module parameter setting\n");
1774                         break;
1775                 }
1776                 IWL_ERR(priv, "On demand firmware reload\n");
1777                 /* Set the FW error flag -- cleared on iwl_down */
1778                 set_bit(STATUS_FW_ERROR, &priv->status);
1779                 wake_up_interruptible(&priv->wait_command_queue);
1780                 /*
1781                  * Keep the restart process from trying to send host
1782                  * commands by clearing the INIT status bit
1783                  */
1784                 clear_bit(STATUS_READY, &priv->status);
1785                 queue_work(priv->workqueue, &priv->restart);
1786                 break;
1787         }
1788         return 0;
1789 }
1790
1791 int
1792 iwl_legacy_mac_change_interface(struct ieee80211_hw *hw,
1793                         struct ieee80211_vif *vif,
1794                         enum nl80211_iftype newtype, bool newp2p)
1795 {
1796         struct iwl_priv *priv = hw->priv;
1797         struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1798         struct iwl_rxon_context *tmp;
1799         u32 interface_modes;
1800         int err;
1801
1802         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1803
1804         mutex_lock(&priv->mutex);
1805
1806         if (!ctx->vif || !iwl_legacy_is_ready_rf(priv)) {
1807                 /*
1808                  * Huh? But wait ... this can maybe happen when
1809                  * we're in the middle of a firmware restart!
1810                  */
1811                 err = -EBUSY;
1812                 goto out;
1813         }
1814
1815         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1816
1817         if (!(interface_modes & BIT(newtype))) {
1818                 err = -EBUSY;
1819                 goto out;
1820         }
1821
1822         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1823                 for_each_context(priv, tmp) {
1824                         if (ctx == tmp)
1825                                 continue;
1826
1827                         if (!tmp->vif)
1828                                 continue;
1829
1830                         /*
1831                          * The current mode switch would be exclusive, but
1832                          * another context is active ... refuse the switch.
1833                          */
1834                         err = -EBUSY;
1835                         goto out;
1836                 }
1837         }
1838
1839         /* success */
1840         iwl_legacy_teardown_interface(priv, vif, true);
1841         vif->type = newtype;
1842         vif->p2p = newp2p;
1843         err = iwl_legacy_setup_interface(priv, ctx);
1844         WARN_ON(err);
1845         /*
1846          * We've switched internally, but submitting to the
1847          * device may have failed for some reason. Mask this
1848          * error, because otherwise mac80211 will not switch
1849          * (and set the interface type back) and we'll be
1850          * out of sync with it.
1851          */
1852         err = 0;
1853
1854  out:
1855         mutex_unlock(&priv->mutex);
1856         return err;
1857 }
1858 EXPORT_SYMBOL(iwl_legacy_mac_change_interface);
1859
1860 /*
1861  * On every watchdog tick we check (latest) time stamp. If it does not
1862  * change during timeout period and queue is not empty we reset firmware.
1863  */
1864 static int iwl_legacy_check_stuck_queue(struct iwl_priv *priv, int cnt)
1865 {
1866         struct iwl_tx_queue *txq = &priv->txq[cnt];
1867         struct iwl_queue *q = &txq->q;
1868         unsigned long timeout;
1869         int ret;
1870
1871         if (q->read_ptr == q->write_ptr) {
1872                 txq->time_stamp = jiffies;
1873                 return 0;
1874         }
1875
1876         timeout = txq->time_stamp +
1877                   msecs_to_jiffies(priv->cfg->base_params->wd_timeout);
1878
1879         if (time_after(jiffies, timeout)) {
1880                 IWL_ERR(priv, "Queue %d stuck for %u ms.\n",
1881                                 q->id, priv->cfg->base_params->wd_timeout);
1882                 ret = iwl_legacy_force_reset(priv, IWL_FW_RESET, false);
1883                 return (ret == -EAGAIN) ? 0 : 1;
1884         }
1885
1886         return 0;
1887 }
1888
1889 /*
1890  * Making watchdog tick be a quarter of timeout assure we will
1891  * discover the queue hung between timeout and 1.25*timeout
1892  */
1893 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1894
1895 /*
1896  * Watchdog timer callback, we check each tx queue for stuck, if if hung
1897  * we reset the firmware. If everything is fine just rearm the timer.
1898  */
1899 void iwl_legacy_bg_watchdog(unsigned long data)
1900 {
1901         struct iwl_priv *priv = (struct iwl_priv *)data;
1902         int cnt;
1903         unsigned long timeout;
1904
1905         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1906                 return;
1907
1908         timeout = priv->cfg->base_params->wd_timeout;
1909         if (timeout == 0)
1910                 return;
1911
1912         /* monitor and check for stuck cmd queue */
1913         if (iwl_legacy_check_stuck_queue(priv, priv->cmd_queue))
1914                 return;
1915
1916         /* monitor and check for other stuck queues */
1917         if (iwl_legacy_is_any_associated(priv)) {
1918                 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1919                         /* skip as we already checked the command queue */
1920                         if (cnt == priv->cmd_queue)
1921                                 continue;
1922                         if (iwl_legacy_check_stuck_queue(priv, cnt))
1923                                 return;
1924                 }
1925         }
1926
1927         mod_timer(&priv->watchdog, jiffies +
1928                   msecs_to_jiffies(IWL_WD_TICK(timeout)));
1929 }
1930 EXPORT_SYMBOL(iwl_legacy_bg_watchdog);
1931
1932 void iwl_legacy_setup_watchdog(struct iwl_priv *priv)
1933 {
1934         unsigned int timeout = priv->cfg->base_params->wd_timeout;
1935
1936         if (timeout)
1937                 mod_timer(&priv->watchdog,
1938                           jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout)));
1939         else
1940                 del_timer(&priv->watchdog);
1941 }
1942 EXPORT_SYMBOL(iwl_legacy_setup_watchdog);
1943
1944 /*
1945  * extended beacon time format
1946  * time in usec will be changed into a 32-bit value in extended:internal format
1947  * the extended part is the beacon counts
1948  * the internal part is the time in usec within one beacon interval
1949  */
1950 u32
1951 iwl_legacy_usecs_to_beacons(struct iwl_priv *priv,
1952                                         u32 usec, u32 beacon_interval)
1953 {
1954         u32 quot;
1955         u32 rem;
1956         u32 interval = beacon_interval * TIME_UNIT;
1957
1958         if (!interval || !usec)
1959                 return 0;
1960
1961         quot = (usec / interval) &
1962                 (iwl_legacy_beacon_time_mask_high(priv,
1963                 priv->hw_params.beacon_time_tsf_bits) >>
1964                 priv->hw_params.beacon_time_tsf_bits);
1965         rem = (usec % interval) & iwl_legacy_beacon_time_mask_low(priv,
1966                                    priv->hw_params.beacon_time_tsf_bits);
1967
1968         return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
1969 }
1970 EXPORT_SYMBOL(iwl_legacy_usecs_to_beacons);
1971
1972 /* base is usually what we get from ucode with each received frame,
1973  * the same as HW timer counter counting down
1974  */
1975 __le32 iwl_legacy_add_beacon_time(struct iwl_priv *priv, u32 base,
1976                            u32 addon, u32 beacon_interval)
1977 {
1978         u32 base_low = base & iwl_legacy_beacon_time_mask_low(priv,
1979                                         priv->hw_params.beacon_time_tsf_bits);
1980         u32 addon_low = addon & iwl_legacy_beacon_time_mask_low(priv,
1981                                         priv->hw_params.beacon_time_tsf_bits);
1982         u32 interval = beacon_interval * TIME_UNIT;
1983         u32 res = (base & iwl_legacy_beacon_time_mask_high(priv,
1984                                 priv->hw_params.beacon_time_tsf_bits)) +
1985                                 (addon & iwl_legacy_beacon_time_mask_high(priv,
1986                                 priv->hw_params.beacon_time_tsf_bits));
1987
1988         if (base_low > addon_low)
1989                 res += base_low - addon_low;
1990         else if (base_low < addon_low) {
1991                 res += interval + base_low - addon_low;
1992                 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1993         } else
1994                 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1995
1996         return cpu_to_le32(res);
1997 }
1998 EXPORT_SYMBOL(iwl_legacy_add_beacon_time);
1999
2000 #ifdef CONFIG_PM
2001
2002 int iwl_legacy_pci_suspend(struct device *device)
2003 {
2004         struct pci_dev *pdev = to_pci_dev(device);
2005         struct iwl_priv *priv = pci_get_drvdata(pdev);
2006
2007         /*
2008          * This function is called when system goes into suspend state
2009          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2010          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2011          * it will not call apm_ops.stop() to stop the DMA operation.
2012          * Calling apm_ops.stop here to make sure we stop the DMA.
2013          */
2014         iwl_legacy_apm_stop(priv);
2015
2016         return 0;
2017 }
2018 EXPORT_SYMBOL(iwl_legacy_pci_suspend);
2019
2020 int iwl_legacy_pci_resume(struct device *device)
2021 {
2022         struct pci_dev *pdev = to_pci_dev(device);
2023         struct iwl_priv *priv = pci_get_drvdata(pdev);
2024         bool hw_rfkill = false;
2025
2026         /*
2027          * We disable the RETRY_TIMEOUT register (0x41) to keep
2028          * PCI Tx retries from interfering with C3 CPU state.
2029          */
2030         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2031
2032         iwl_legacy_enable_interrupts(priv);
2033
2034         if (!(iwl_read32(priv, CSR_GP_CNTRL) &
2035                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
2036                 hw_rfkill = true;
2037
2038         if (hw_rfkill)
2039                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2040         else
2041                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2042
2043         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
2044
2045         return 0;
2046 }
2047 EXPORT_SYMBOL(iwl_legacy_pci_resume);
2048
2049 const struct dev_pm_ops iwl_legacy_pm_ops = {
2050         .suspend = iwl_legacy_pci_suspend,
2051         .resume = iwl_legacy_pci_resume,
2052         .freeze = iwl_legacy_pci_suspend,
2053         .thaw = iwl_legacy_pci_resume,
2054         .poweroff = iwl_legacy_pci_suspend,
2055         .restore = iwl_legacy_pci_resume,
2056 };
2057 EXPORT_SYMBOL(iwl_legacy_pm_ops);
2058
2059 #endif /* CONFIG_PM */
2060
2061 static void
2062 iwl_legacy_update_qos(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
2063 {
2064         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2065                 return;
2066
2067         if (!ctx->is_active)
2068                 return;
2069
2070         ctx->qos_data.def_qos_parm.qos_flags = 0;
2071
2072         if (ctx->qos_data.qos_active)
2073                 ctx->qos_data.def_qos_parm.qos_flags |=
2074                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2075
2076         if (ctx->ht.enabled)
2077                 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
2078
2079         IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
2080                       ctx->qos_data.qos_active,
2081                       ctx->qos_data.def_qos_parm.qos_flags);
2082
2083         iwl_legacy_send_cmd_pdu_async(priv, ctx->qos_cmd,
2084                                sizeof(struct iwl_qosparam_cmd),
2085                                &ctx->qos_data.def_qos_parm, NULL);
2086 }
2087
2088 /**
2089  * iwl_legacy_mac_config - mac80211 config callback
2090  */
2091 int iwl_legacy_mac_config(struct ieee80211_hw *hw, u32 changed)
2092 {
2093         struct iwl_priv *priv = hw->priv;
2094         const struct iwl_channel_info *ch_info;
2095         struct ieee80211_conf *conf = &hw->conf;
2096         struct ieee80211_channel *channel = conf->channel;
2097         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2098         struct iwl_rxon_context *ctx;
2099         unsigned long flags = 0;
2100         int ret = 0;
2101         u16 ch;
2102         int scan_active = 0;
2103         bool ht_changed[NUM_IWL_RXON_CTX] = {};
2104
2105         if (WARN_ON(!priv->cfg->ops->legacy))
2106                 return -EOPNOTSUPP;
2107
2108         mutex_lock(&priv->mutex);
2109
2110         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2111                                         channel->hw_value, changed);
2112
2113         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
2114                 scan_active = 1;
2115                 IWL_DEBUG_MAC80211(priv, "scan active\n");
2116         }
2117
2118         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2119                        IEEE80211_CONF_CHANGE_CHANNEL)) {
2120                 /* mac80211 uses static for non-HT which is what we want */
2121                 priv->current_ht_config.smps = conf->smps_mode;
2122
2123                 /*
2124                  * Recalculate chain counts.
2125                  *
2126                  * If monitor mode is enabled then mac80211 will
2127                  * set up the SM PS mode to OFF if an HT channel is
2128                  * configured.
2129                  */
2130                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2131                         for_each_context(priv, ctx)
2132                                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2133         }
2134
2135         /* during scanning mac80211 will delay channel setting until
2136          * scan finish with changed = 0
2137          */
2138         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2139                 if (scan_active)
2140                         goto set_ch_out;
2141
2142                 ch = channel->hw_value;
2143                 ch_info = iwl_legacy_get_channel_info(priv, channel->band, ch);
2144                 if (!iwl_legacy_is_channel_valid(ch_info)) {
2145                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2146                         ret = -EINVAL;
2147                         goto set_ch_out;
2148                 }
2149
2150                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2151                     !iwl_legacy_is_channel_ibss(ch_info)) {
2152                         IWL_DEBUG_MAC80211(priv, "leave - not IBSS channel\n");
2153                         ret = -EINVAL;
2154                         goto set_ch_out;
2155                 }
2156
2157                 spin_lock_irqsave(&priv->lock, flags);
2158
2159                 for_each_context(priv, ctx) {
2160                         /* Configure HT40 channels */
2161                         if (ctx->ht.enabled != conf_is_ht(conf)) {
2162                                 ctx->ht.enabled = conf_is_ht(conf);
2163                                 ht_changed[ctx->ctxid] = true;
2164                         }
2165                         if (ctx->ht.enabled) {
2166                                 if (conf_is_ht40_minus(conf)) {
2167                                         ctx->ht.extension_chan_offset =
2168                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2169                                         ctx->ht.is_40mhz = true;
2170                                 } else if (conf_is_ht40_plus(conf)) {
2171                                         ctx->ht.extension_chan_offset =
2172                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2173                                         ctx->ht.is_40mhz = true;
2174                                 } else {
2175                                         ctx->ht.extension_chan_offset =
2176                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2177                                         ctx->ht.is_40mhz = false;
2178                                 }
2179                         } else
2180                                 ctx->ht.is_40mhz = false;
2181
2182                         /*
2183                          * Default to no protection. Protection mode will
2184                          * later be set from BSS config in iwl_ht_conf
2185                          */
2186                         ctx->ht.protection =
2187                                         IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2188
2189                         /* if we are switching from ht to 2.4 clear flags
2190                          * from any ht related info since 2.4 does not
2191                          * support ht */
2192                         if ((le16_to_cpu(ctx->staging.channel) != ch))
2193                                 ctx->staging.flags = 0;
2194
2195                         iwl_legacy_set_rxon_channel(priv, channel, ctx);
2196                         iwl_legacy_set_rxon_ht(priv, ht_conf);
2197
2198                         iwl_legacy_set_flags_for_band(priv, ctx, channel->band,
2199                                                ctx->vif);
2200                 }
2201
2202                 spin_unlock_irqrestore(&priv->lock, flags);
2203
2204                 if (priv->cfg->ops->legacy->update_bcast_stations)
2205                         ret =
2206                         priv->cfg->ops->legacy->update_bcast_stations(priv);
2207
2208  set_ch_out:
2209                 /* The list of supported rates and rate mask can be different
2210                  * for each band; since the band may have changed, reset
2211                  * the rate mask to what mac80211 lists */
2212                 iwl_legacy_set_rate(priv);
2213         }
2214
2215         if (changed & (IEEE80211_CONF_CHANGE_PS |
2216                         IEEE80211_CONF_CHANGE_IDLE)) {
2217                 ret = iwl_legacy_power_update_mode(priv, false);
2218                 if (ret)
2219                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2220         }
2221
2222         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2223                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2224                         priv->tx_power_user_lmt, conf->power_level);
2225
2226                 iwl_legacy_set_tx_power(priv, conf->power_level, false);
2227         }
2228
2229         if (!iwl_legacy_is_ready(priv)) {
2230                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2231                 goto out;
2232         }
2233
2234         if (scan_active)
2235                 goto out;
2236
2237         for_each_context(priv, ctx) {
2238                 if (memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging)))
2239                         iwl_legacy_commit_rxon(priv, ctx);
2240                 else
2241                         IWL_DEBUG_INFO(priv,
2242                                 "Not re-sending same RXON configuration.\n");
2243                 if (ht_changed[ctx->ctxid])
2244                         iwl_legacy_update_qos(priv, ctx);
2245         }
2246
2247 out:
2248         IWL_DEBUG_MAC80211(priv, "leave\n");
2249         mutex_unlock(&priv->mutex);
2250         return ret;
2251 }
2252 EXPORT_SYMBOL(iwl_legacy_mac_config);
2253
2254 void iwl_legacy_mac_reset_tsf(struct ieee80211_hw *hw)
2255 {
2256         struct iwl_priv *priv = hw->priv;
2257         unsigned long flags;
2258         /* IBSS can only be the IWL_RXON_CTX_BSS context */
2259         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2260
2261         if (WARN_ON(!priv->cfg->ops->legacy))
2262                 return;
2263
2264         mutex_lock(&priv->mutex);
2265         IWL_DEBUG_MAC80211(priv, "enter\n");
2266
2267         spin_lock_irqsave(&priv->lock, flags);
2268         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2269         spin_unlock_irqrestore(&priv->lock, flags);
2270
2271         spin_lock_irqsave(&priv->lock, flags);
2272
2273         /* new association get rid of ibss beacon skb */
2274         if (priv->beacon_skb)
2275                 dev_kfree_skb(priv->beacon_skb);
2276
2277         priv->beacon_skb = NULL;
2278
2279         priv->timestamp = 0;
2280
2281         spin_unlock_irqrestore(&priv->lock, flags);
2282
2283         iwl_legacy_scan_cancel_timeout(priv, 100);
2284         if (!iwl_legacy_is_ready_rf(priv)) {
2285                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2286                 mutex_unlock(&priv->mutex);
2287                 return;
2288         }
2289
2290         /* we are restarting association process
2291          * clear RXON_FILTER_ASSOC_MSK bit
2292          */
2293         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2294         iwl_legacy_commit_rxon(priv, ctx);
2295
2296         iwl_legacy_set_rate(priv);
2297
2298         mutex_unlock(&priv->mutex);
2299
2300         IWL_DEBUG_MAC80211(priv, "leave\n");
2301 }
2302 EXPORT_SYMBOL(iwl_legacy_mac_reset_tsf);
2303
2304 static void iwl_legacy_ht_conf(struct iwl_priv *priv,
2305                         struct ieee80211_vif *vif)
2306 {
2307         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2308         struct ieee80211_sta *sta;
2309         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2310         struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2311
2312         IWL_DEBUG_ASSOC(priv, "enter:\n");
2313
2314         if (!ctx->ht.enabled)
2315                 return;
2316
2317         ctx->ht.protection =
2318                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2319         ctx->ht.non_gf_sta_present =
2320                 !!(bss_conf->ht_operation_mode &
2321                                 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2322
2323         ht_conf->single_chain_sufficient = false;
2324
2325         switch (vif->type) {
2326         case NL80211_IFTYPE_STATION:
2327                 rcu_read_lock();
2328                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
2329                 if (sta) {
2330                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
2331                         int maxstreams;
2332
2333                         maxstreams = (ht_cap->mcs.tx_params &
2334                               IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
2335                                 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2336                         maxstreams += 1;
2337
2338                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
2339                             (ht_cap->mcs.rx_mask[2] == 0))
2340                                 ht_conf->single_chain_sufficient = true;
2341                         if (maxstreams <= 1)
2342                                 ht_conf->single_chain_sufficient = true;
2343                 } else {
2344                         /*
2345                          * If at all, this can only happen through a race
2346                          * when the AP disconnects us while we're still
2347                          * setting up the connection, in that case mac80211
2348                          * will soon tell us about that.
2349                          */
2350                         ht_conf->single_chain_sufficient = true;
2351                 }
2352                 rcu_read_unlock();
2353                 break;
2354         case NL80211_IFTYPE_ADHOC:
2355                 ht_conf->single_chain_sufficient = true;
2356                 break;
2357         default:
2358                 break;
2359         }
2360
2361         IWL_DEBUG_ASSOC(priv, "leave\n");
2362 }
2363
2364 static inline void iwl_legacy_set_no_assoc(struct iwl_priv *priv,
2365                                     struct ieee80211_vif *vif)
2366 {
2367         struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2368
2369         /*
2370          * inform the ucode that there is no longer an
2371          * association and that no more packets should be
2372          * sent
2373          */
2374         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2375         ctx->staging.assoc_id = 0;
2376         iwl_legacy_commit_rxon(priv, ctx);
2377 }
2378
2379 static void iwl_legacy_beacon_update(struct ieee80211_hw *hw,
2380                                   struct ieee80211_vif *vif)
2381 {
2382         struct iwl_priv *priv = hw->priv;
2383         unsigned long flags;
2384         __le64 timestamp;
2385         struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
2386
2387         if (!skb)
2388                 return;
2389
2390         IWL_DEBUG_MAC80211(priv, "enter\n");
2391
2392         lockdep_assert_held(&priv->mutex);
2393
2394         if (!priv->beacon_ctx) {
2395                 IWL_ERR(priv, "update beacon but no beacon context!\n");
2396                 dev_kfree_skb(skb);
2397                 return;
2398         }
2399
2400         spin_lock_irqsave(&priv->lock, flags);
2401
2402         if (priv->beacon_skb)
2403                 dev_kfree_skb(priv->beacon_skb);
2404
2405         priv->beacon_skb = skb;
2406
2407         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2408         priv->timestamp = le64_to_cpu(timestamp);
2409
2410         IWL_DEBUG_MAC80211(priv, "leave\n");
2411         spin_unlock_irqrestore(&priv->lock, flags);
2412
2413         if (!iwl_legacy_is_ready_rf(priv)) {
2414                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2415                 return;
2416         }
2417
2418         priv->cfg->ops->legacy->post_associate(priv);
2419 }
2420
2421 void iwl_legacy_mac_bss_info_changed(struct ieee80211_hw *hw,
2422                                      struct ieee80211_vif *vif,
2423                                      struct ieee80211_bss_conf *bss_conf,
2424                                      u32 changes)
2425 {
2426         struct iwl_priv *priv = hw->priv;
2427         struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2428         int ret;
2429
2430         if (WARN_ON(!priv->cfg->ops->legacy))
2431                 return;
2432
2433         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2434
2435         mutex_lock(&priv->mutex);
2436
2437         if (!iwl_legacy_is_alive(priv)) {
2438                 mutex_unlock(&priv->mutex);
2439                 return;
2440         }
2441
2442         if (changes & BSS_CHANGED_QOS) {
2443                 unsigned long flags;
2444
2445                 spin_lock_irqsave(&priv->lock, flags);
2446                 ctx->qos_data.qos_active = bss_conf->qos;
2447                 iwl_legacy_update_qos(priv, ctx);
2448                 spin_unlock_irqrestore(&priv->lock, flags);
2449         }
2450
2451         if (changes & BSS_CHANGED_BEACON_ENABLED) {
2452                 /*
2453                  * the add_interface code must make sure we only ever
2454                  * have a single interface that could be beaconing at
2455                  * any time.
2456                  */
2457                 if (vif->bss_conf.enable_beacon)
2458                         priv->beacon_ctx = ctx;
2459                 else
2460                         priv->beacon_ctx = NULL;
2461         }
2462
2463         if (changes & BSS_CHANGED_BSSID) {
2464                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
2465
2466                 /*
2467                  * If there is currently a HW scan going on in the
2468                  * background then we need to cancel it else the RXON
2469                  * below/in post_associate will fail.
2470                  */
2471                 if (iwl_legacy_scan_cancel_timeout(priv, 100)) {
2472                         IWL_WARN(priv,
2473                                 "Aborted scan still in progress after 100ms\n");
2474                         IWL_DEBUG_MAC80211(priv,
2475                                 "leaving - scan abort failed.\n");
2476                         mutex_unlock(&priv->mutex);
2477                         return;
2478                 }
2479
2480                 /* mac80211 only sets assoc when in STATION mode */
2481                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
2482                         memcpy(ctx->staging.bssid_addr,
2483                                bss_conf->bssid, ETH_ALEN);
2484
2485                         /* currently needed in a few places */
2486                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2487                 } else {
2488                         ctx->staging.filter_flags &=
2489                                 ~RXON_FILTER_ASSOC_MSK;
2490                 }
2491
2492         }
2493
2494         /*
2495          * This needs to be after setting the BSSID in case
2496          * mac80211 decides to do both changes at once because
2497          * it will invoke post_associate.
2498          */
2499         if (vif->type == NL80211_IFTYPE_ADHOC && changes & BSS_CHANGED_BEACON)
2500                 iwl_legacy_beacon_update(hw, vif);
2501
2502         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2503                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2504                                    bss_conf->use_short_preamble);
2505                 if (bss_conf->use_short_preamble)
2506                         ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2507                 else
2508                         ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2509         }
2510
2511         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2512                 IWL_DEBUG_MAC80211(priv,
2513                         "ERP_CTS %d\n", bss_conf->use_cts_prot);
2514                 if (bss_conf->use_cts_prot &&
2515                         (priv->band != IEEE80211_BAND_5GHZ))
2516                         ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
2517                 else
2518                         ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2519                 if (bss_conf->use_cts_prot)
2520                         ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
2521                 else
2522                         ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
2523         }
2524
2525         if (changes & BSS_CHANGED_BASIC_RATES) {
2526                 /* XXX use this information
2527                  *
2528                  * To do that, remove code from iwl_legacy_set_rate() and put something
2529                  * like this here:
2530                  *
2531                 if (A-band)
2532                         ctx->staging.ofdm_basic_rates =
2533                                 bss_conf->basic_rates;
2534                 else
2535                         ctx->staging.ofdm_basic_rates =
2536                                 bss_conf->basic_rates >> 4;
2537                         ctx->staging.cck_basic_rates =
2538                                 bss_conf->basic_rates & 0xF;
2539                  */
2540         }
2541
2542         if (changes & BSS_CHANGED_HT) {
2543                 iwl_legacy_ht_conf(priv, vif);
2544
2545                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2546                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2547         }
2548
2549         if (changes & BSS_CHANGED_ASSOC) {
2550                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2551                 if (bss_conf->assoc) {
2552                         priv->timestamp = bss_conf->timestamp;
2553
2554                         if (!iwl_legacy_is_rfkill(priv))
2555                                 priv->cfg->ops->legacy->post_associate(priv);
2556                 } else
2557                         iwl_legacy_set_no_assoc(priv, vif);
2558         }
2559
2560         if (changes && iwl_legacy_is_associated_ctx(ctx) && bss_conf->aid) {
2561                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
2562                                    changes);
2563                 ret = iwl_legacy_send_rxon_assoc(priv, ctx);
2564                 if (!ret) {
2565                         /* Sync active_rxon with latest change. */
2566                         memcpy((void *)&ctx->active,
2567                                 &ctx->staging,
2568                                 sizeof(struct iwl_legacy_rxon_cmd));
2569                 }
2570         }
2571
2572         if (changes & BSS_CHANGED_BEACON_ENABLED) {
2573                 if (vif->bss_conf.enable_beacon) {
2574                         memcpy(ctx->staging.bssid_addr,
2575                                bss_conf->bssid, ETH_ALEN);
2576                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2577                         priv->cfg->ops->legacy->config_ap(priv);
2578                 } else
2579                         iwl_legacy_set_no_assoc(priv, vif);
2580         }
2581
2582         if (changes & BSS_CHANGED_IBSS) {
2583                 ret = priv->cfg->ops->legacy->manage_ibss_station(priv, vif,
2584                                                         bss_conf->ibss_joined);
2585                 if (ret)
2586                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
2587                                 bss_conf->ibss_joined ? "add" : "remove",
2588                                 bss_conf->bssid);
2589         }
2590
2591         mutex_unlock(&priv->mutex);
2592
2593         IWL_DEBUG_MAC80211(priv, "leave\n");
2594 }
2595 EXPORT_SYMBOL(iwl_legacy_mac_bss_info_changed);
2596
2597 irqreturn_t iwl_legacy_isr(int irq, void *data)
2598 {
2599         struct iwl_priv *priv = data;
2600         u32 inta, inta_mask;
2601         u32 inta_fh;
2602         unsigned long flags;
2603         if (!priv)
2604                 return IRQ_NONE;
2605
2606         spin_lock_irqsave(&priv->lock, flags);
2607
2608         /* Disable (but don't clear!) interrupts here to avoid
2609          *    back-to-back ISRs and sporadic interrupts from our NIC.
2610          * If we have something to service, the tasklet will re-enable ints.
2611          * If we *don't* have something, we'll re-enable before leaving here. */
2612         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
2613         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
2614
2615         /* Discover which interrupts are active/pending */
2616         inta = iwl_read32(priv, CSR_INT);
2617         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2618
2619         /* Ignore interrupt if there's nothing in NIC to service.
2620          * This may be due to IRQ shared with another device,
2621          * or due to sporadic interrupts thrown from our NIC. */
2622         if (!inta && !inta_fh) {
2623                 IWL_DEBUG_ISR(priv,
2624                         "Ignore interrupt, inta == 0, inta_fh == 0\n");
2625                 goto none;
2626         }
2627
2628         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
2629                 /* Hardware disappeared. It might have already raised
2630                  * an interrupt */
2631                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
2632                 goto unplugged;
2633         }
2634
2635         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
2636                       inta, inta_mask, inta_fh);
2637
2638         inta &= ~CSR_INT_BIT_SCD;
2639
2640         /* iwl_irq_tasklet() will service interrupts and re-enable them */
2641         if (likely(inta || inta_fh))
2642                 tasklet_schedule(&priv->irq_tasklet);
2643
2644 unplugged:
2645         spin_unlock_irqrestore(&priv->lock, flags);
2646         return IRQ_HANDLED;
2647
2648 none:
2649         /* re-enable interrupts here since we don't have anything to service. */
2650         /* only Re-enable if disabled by irq */
2651         if (test_bit(STATUS_INT_ENABLED, &priv->status))
2652                 iwl_legacy_enable_interrupts(priv);
2653         spin_unlock_irqrestore(&priv->lock, flags);
2654         return IRQ_NONE;
2655 }
2656 EXPORT_SYMBOL(iwl_legacy_isr);
2657
2658 /*
2659  *  iwl_legacy_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
2660  *  function.
2661  */
2662 void iwl_legacy_tx_cmd_protection(struct iwl_priv *priv,
2663                                struct ieee80211_tx_info *info,
2664                                __le16 fc, __le32 *tx_flags)
2665 {
2666         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
2667                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
2668                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2669                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2670
2671                 if (!ieee80211_is_mgmt(fc))
2672                         return;
2673
2674                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2675                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2676                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2677                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2678                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2679                         *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2680                         *tx_flags |= TX_CMD_FLG_CTS_MSK;
2681                         break;
2682                 }
2683         } else if (info->control.rates[0].flags &
2684                    IEEE80211_TX_RC_USE_CTS_PROTECT) {
2685                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2686                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
2687                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2688         }
2689 }
2690 EXPORT_SYMBOL(iwl_legacy_tx_cmd_protection);