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 (priv->switch_rxon.switch_in_progress) {
 863                 ieee80211_chswitch_done(ctx->vif, is_success);
 864                 mutex_lock(&priv->mutex);
 865                 priv->switch_rxon.switch_in_progress = false;
 866                 mutex_unlock(&priv->mutex);
 867         }
 868 }
 869 EXPORT_SYMBOL(iwl_legacy_chswitch_done);
 870
 871 void iwl_legacy_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
 872 {
 873         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 874         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
 875
 876         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 877         struct iwl_legacy_rxon_cmd *rxon = (void *)&ctx->active;
 878
 879         if (priv->switch_rxon.switch_in_progress) {
 880                 if (!le32_to_cpu(csa->status) &&
 881                     (csa->channel == priv->switch_rxon.channel)) {
 882                         rxon->channel = csa->channel;
 883                         ctx->staging.channel = csa->channel;
 884                         IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
 885                               le16_to_cpu(csa->channel));
 886                         iwl_legacy_chswitch_done(priv, true);
 887                 } else {
 888                         IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
 889                               le16_to_cpu(csa->channel));
 890                         iwl_legacy_chswitch_done(priv, false);
 891                 }
 892         }
 893 }
 894 EXPORT_SYMBOL(iwl_legacy_rx_csa);
 895
 896 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
 897 void iwl_legacy_print_rx_config_cmd(struct iwl_priv *priv,
 898                              struct iwl_rxon_context *ctx)
 899 {
 900         struct iwl_legacy_rxon_cmd *rxon = &ctx->staging;
 901
 902         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
 903         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
 904         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",
 905                                 le16_to_cpu(rxon->channel));
 906         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
 907         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
 908                                 le32_to_cpu(rxon->filter_flags));
 909         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
 910         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
 911                         rxon->ofdm_basic_rates);
 912         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",
 913                                 rxon->cck_basic_rates);
 914         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
 915         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
 916         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",
 917                                 le16_to_cpu(rxon->assoc_id));
 918 }
 919 EXPORT_SYMBOL(iwl_legacy_print_rx_config_cmd);
 920 #endif
 921 /**
 922  * iwl_legacy_irq_handle_error - called for HW or SW error interrupt from card
 923  */
 924 void iwl_legacy_irq_handle_error(struct iwl_priv *priv)
 925 {
 926         /* Set the FW error flag -- cleared on iwl_down */
 927         set_bit(STATUS_FW_ERROR, &priv->status);
 928
 929         /* Cancel currently queued command. */
 930         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 931
 932         IWL_ERR(priv, "Loaded firmware version: %s\n",
 933                 priv->hw->wiphy->fw_version);
 934
 935         priv->cfg->ops->lib->dump_nic_error_log(priv);
 936         if (priv->cfg->ops->lib->dump_fh)
 937                 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
 938         priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
 939 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
 940         if (iwl_legacy_get_debug_level(priv) & IWL_DL_FW_ERRORS)
 941                 iwl_legacy_print_rx_config_cmd(priv,
 942                                         &priv->contexts[IWL_RXON_CTX_BSS]);
 943 #endif
 944
 945         wake_up_interruptible(&priv->wait_command_queue);
 946
 947         /* Keep the restart process from trying to send host
 948          * commands by clearing the INIT status bit */
 949         clear_bit(STATUS_READY, &priv->status);
 950
 951         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 952                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
 953                           "Restarting adapter due to uCode error.\n");
 954
 955                 if (priv->cfg->mod_params->restart_fw)
 956                         queue_work(priv->workqueue, &priv->restart);
 957         }
 958 }
 959 EXPORT_SYMBOL(iwl_legacy_irq_handle_error);
 960
 961 static int iwl_legacy_apm_stop_master(struct iwl_priv *priv)
 962 {
 963         int ret = 0;
 964
 965         /* stop device's busmaster DMA activity */
 966         iwl_legacy_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 967
 968         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
 969                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 970         if (ret)
 971                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
 972
 973         IWL_DEBUG_INFO(priv, "stop master\n");
 974
 975         return ret;
 976 }
 977
 978 void iwl_legacy_apm_stop(struct iwl_priv *priv)
 979 {
 980         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
 981
 982         /* Stop device's DMA activity */
 983         iwl_legacy_apm_stop_master(priv);
 984
 985         /* Reset the entire device */
 986         iwl_legacy_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 987
 988         udelay(10);
 989
 990         /*
 991          * Clear "initialization complete" bit to move adapter from
 992          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
 993          */
 994         iwl_legacy_clear_bit(priv, CSR_GP_CNTRL,
 995                                 CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 996 }
 997 EXPORT_SYMBOL(iwl_legacy_apm_stop);
 998
 999
1000 /*
1001  * Start up NIC's basic functionality after it has been reset
1002  * (e.g. after platform boot, or shutdown via iwl_legacy_apm_stop())
1003  * NOTE:  This does not load uCode nor start the embedded processor
1004  */
1005 int iwl_legacy_apm_init(struct iwl_priv *priv)
1006 {
1007         int ret = 0;
1008         u16 lctl;
1009
1010         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1011
1012         /*
1013          * Use "set_bit" below rather than "write", to preserve any hardware
1014          * bits already set by default after reset.
1015          */
1016
1017         /* Disable L0S exit timer (platform NMI Work/Around) */
1018         iwl_legacy_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1019                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1020
1021         /*
1022          * Disable L0s without affecting L1;
1023          *  don't wait for ICH L0s (ICH bug W/A)
1024          */
1025         iwl_legacy_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1026                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1027
1028         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1029         iwl_legacy_set_bit(priv, CSR_DBG_HPET_MEM_REG,
1030                                         CSR_DBG_HPET_MEM_REG_VAL);
1031
1032         /*
1033          * Enable HAP INTA (interrupt from management bus) to
1034          * wake device's PCI Express link L1a -> L0s
1035          * NOTE:  This is no-op for 3945 (non-existent bit)
1036          */
1037         iwl_legacy_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1038                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1039
1040         /*
1041          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1042          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1043          * If so (likely), disable L0S, so device moves directly L0->L1;
1044          *    costs negligible amount of power savings.
1045          * If not (unlikely), enable L0S, so there is at least some
1046          *    power savings, even without L1.
1047          */
1048         if (priv->cfg->base_params->set_l0s) {
1049                 lctl = iwl_legacy_pcie_link_ctl(priv);
1050                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1051                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1052                         /* L1-ASPM enabled; disable(!) L0S  */
1053                         iwl_legacy_set_bit(priv, CSR_GIO_REG,
1054                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1055                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1056                 } else {
1057                         /* L1-ASPM disabled; enable(!) L0S */
1058                         iwl_legacy_clear_bit(priv, CSR_GIO_REG,
1059                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1060                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1061                 }
1062         }
1063
1064         /* Configure analog phase-lock-loop before activating to D0A */
1065         if (priv->cfg->base_params->pll_cfg_val)
1066                 iwl_legacy_set_bit(priv, CSR_ANA_PLL_CFG,
1067                             priv->cfg->base_params->pll_cfg_val);
1068
1069         /*
1070          * Set "initialization complete" bit to move adapter from
1071          * D0U* --> D0A* (powered-up active) state.
1072          */
1073         iwl_legacy_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1074
1075         /*
1076          * Wait for clock stabilization; once stabilized, access to
1077          * device-internal resources is supported, e.g. iwl_legacy_write_prph()
1078          * and accesses to uCode SRAM.
1079          */
1080         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1081                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1082                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1083         if (ret < 0) {
1084                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1085                 goto out;
1086         }
1087
1088         /*
1089          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1090          * BSM (Boostrap State Machine) is only in 3945 and 4965.
1091          *
1092          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1093          * do not disable clocks.  This preserves any hardware bits already
1094          * set by default in "CLK_CTRL_REG" after reset.
1095          */
1096         if (priv->cfg->base_params->use_bsm)
1097                 iwl_legacy_write_prph(priv, APMG_CLK_EN_REG,
1098                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1099         else
1100                 iwl_legacy_write_prph(priv, APMG_CLK_EN_REG,
1101                         APMG_CLK_VAL_DMA_CLK_RQT);
1102         udelay(20);
1103
1104         /* Disable L1-Active */
1105         iwl_legacy_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1106                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1107
1108 out:
1109         return ret;
1110 }
1111 EXPORT_SYMBOL(iwl_legacy_apm_init);
1112
1113
1114 int iwl_legacy_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1115 {
1116         int ret;
1117         s8 prev_tx_power;
1118         bool defer;
1119         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1120
1121         lockdep_assert_held(&priv->mutex);
1122
1123         if (priv->tx_power_user_lmt == tx_power && !force)
1124                 return 0;
1125
1126         if (!priv->cfg->ops->lib->send_tx_power)
1127                 return -EOPNOTSUPP;
1128
1129         /* 0 dBm mean 1 milliwatt */
1130         if (tx_power < 0) {
1131                 IWL_WARN(priv,
1132                          "Requested user TXPOWER %d below 1 mW.\n",
1133                          tx_power);
1134                 return -EINVAL;
1135         }
1136
1137         if (tx_power > priv->tx_power_device_lmt) {
1138                 IWL_WARN(priv,
1139                         "Requested user TXPOWER %d above upper limit %d.\n",
1140                          tx_power, priv->tx_power_device_lmt);
1141                 return -EINVAL;
1142         }
1143
1144         if (!iwl_legacy_is_ready_rf(priv))
1145                 return -EIO;
1146
1147         /* scan complete and commit_rxon use tx_power_next value,
1148          * it always need to be updated for newest request */
1149         priv->tx_power_next = tx_power;
1150
1151         /* do not set tx power when scanning or channel changing */
1152         defer = test_bit(STATUS_SCANNING, &priv->status) ||
1153                 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
1154         if (defer && !force) {
1155                 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
1156                 return 0;
1157         }
1158
1159         prev_tx_power = priv->tx_power_user_lmt;
1160         priv->tx_power_user_lmt = tx_power;
1161
1162         ret = priv->cfg->ops->lib->send_tx_power(priv);
1163
1164         /* if fail to set tx_power, restore the orig. tx power */
1165         if (ret) {
1166                 priv->tx_power_user_lmt = prev_tx_power;
1167                 priv->tx_power_next = prev_tx_power;
1168         }
1169         return ret;
1170 }
1171 EXPORT_SYMBOL(iwl_legacy_set_tx_power);
1172
1173 void iwl_legacy_send_bt_config(struct iwl_priv *priv)
1174 {
1175         struct iwl_bt_cmd bt_cmd = {
1176                 .lead_time = BT_LEAD_TIME_DEF,
1177                 .max_kill = BT_MAX_KILL_DEF,
1178                 .kill_ack_mask = 0,
1179                 .kill_cts_mask = 0,
1180         };
1181
1182         if (!bt_coex_active)
1183                 bt_cmd.flags = BT_COEX_DISABLE;
1184         else
1185                 bt_cmd.flags = BT_COEX_ENABLE;
1186
1187         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1188                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1189
1190         if (iwl_legacy_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1191                              sizeof(struct iwl_bt_cmd), &bt_cmd))
1192                 IWL_ERR(priv, "failed to send BT Coex Config\n");
1193 }
1194 EXPORT_SYMBOL(iwl_legacy_send_bt_config);
1195
1196 int iwl_legacy_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1197 {
1198         struct iwl_statistics_cmd statistics_cmd = {
1199                 .configuration_flags =
1200                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1201         };
1202
1203         if (flags & CMD_ASYNC)
1204                 return iwl_legacy_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1205                                         sizeof(struct iwl_statistics_cmd),
1206                                         &statistics_cmd, NULL);
1207         else
1208                 return iwl_legacy_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1209                                         sizeof(struct iwl_statistics_cmd),
1210                                         &statistics_cmd);
1211 }
1212 EXPORT_SYMBOL(iwl_legacy_send_statistics_request);
1213
1214 void iwl_legacy_rx_pm_sleep_notif(struct iwl_priv *priv,
1215                            struct iwl_rx_mem_buffer *rxb)
1216 {
1217 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUG
1218         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1219         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1220         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1221                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1222 #endif
1223 }
1224 EXPORT_SYMBOL(iwl_legacy_rx_pm_sleep_notif);
1225
1226 void iwl_legacy_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1227                                       struct iwl_rx_mem_buffer *rxb)
1228 {
1229         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1230         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1231         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1232                         "notification for %s:\n", len,
1233                         iwl_legacy_get_cmd_string(pkt->hdr.cmd));
1234         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1235 }
1236 EXPORT_SYMBOL(iwl_legacy_rx_pm_debug_statistics_notif);
1237
1238 void iwl_legacy_rx_reply_error(struct iwl_priv *priv,
1239                         struct iwl_rx_mem_buffer *rxb)
1240 {
1241         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1242
1243         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1244                 "seq 0x%04X ser 0x%08X\n",
1245                 le32_to_cpu(pkt->u.err_resp.error_type),
1246                 iwl_legacy_get_cmd_string(pkt->u.err_resp.cmd_id),
1247                 pkt->u.err_resp.cmd_id,
1248                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1249                 le32_to_cpu(pkt->u.err_resp.error_info));
1250 }
1251 EXPORT_SYMBOL(iwl_legacy_rx_reply_error);
1252
1253 void iwl_legacy_clear_isr_stats(struct iwl_priv *priv)
1254 {
1255         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1256 }
1257
1258 int iwl_legacy_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1259                            const struct ieee80211_tx_queue_params *params)
1260 {
1261         struct iwl_priv *priv = hw->priv;
1262         struct iwl_rxon_context *ctx;
1263         unsigned long flags;
1264         int q;
1265
1266         IWL_DEBUG_MAC80211(priv, "enter\n");
1267
1268         if (!iwl_legacy_is_ready_rf(priv)) {
1269                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1270                 return -EIO;
1271         }
1272
1273         if (queue >= AC_NUM) {
1274                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1275                 return 0;
1276         }
1277
1278         q = AC_NUM - 1 - queue;
1279
1280         spin_lock_irqsave(&priv->lock, flags);
1281
1282         for_each_context(priv, ctx) {
1283                 ctx->qos_data.def_qos_parm.ac[q].cw_min =
1284                         cpu_to_le16(params->cw_min);
1285                 ctx->qos_data.def_qos_parm.ac[q].cw_max =
1286                         cpu_to_le16(params->cw_max);
1287                 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1288                 ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1289                                 cpu_to_le16((params->txop * 32));
1290
1291                 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1292         }
1293
1294         spin_unlock_irqrestore(&priv->lock, flags);
1295
1296         IWL_DEBUG_MAC80211(priv, "leave\n");
1297         return 0;
1298 }
1299 EXPORT_SYMBOL(iwl_legacy_mac_conf_tx);
1300
1301 int iwl_legacy_mac_tx_last_beacon(struct ieee80211_hw *hw)
1302 {
1303         struct iwl_priv *priv = hw->priv;
1304
1305         return priv->ibss_manager == IWL_IBSS_MANAGER;
1306 }
1307 EXPORT_SYMBOL_GPL(iwl_legacy_mac_tx_last_beacon);
1308
1309 static int
1310 iwl_legacy_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1311 {
1312         iwl_legacy_connection_init_rx_config(priv, ctx);
1313
1314         if (priv->cfg->ops->hcmd->set_rxon_chain)
1315                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1316
1317         return iwl_legacy_commit_rxon(priv, ctx);
1318 }
1319
1320 static int iwl_legacy_setup_interface(struct iwl_priv *priv,
1321                                struct iwl_rxon_context *ctx)
1322 {
1323         struct ieee80211_vif *vif = ctx->vif;
1324         int err;
1325
1326         lockdep_assert_held(&priv->mutex);
1327
1328         /*
1329          * This variable will be correct only when there's just
1330          * a single context, but all code using it is for hardware
1331          * that supports only one context.
1332          */
1333         priv->iw_mode = vif->type;
1334
1335         ctx->is_active = true;
1336
1337         err = iwl_legacy_set_mode(priv, ctx);
1338         if (err) {
1339                 if (!ctx->always_active)
1340                         ctx->is_active = false;
1341                 return err;
1342         }
1343
1344         return 0;
1345 }
1346
1347 int
1348 iwl_legacy_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1349 {
1350         struct iwl_priv *priv = hw->priv;
1351         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1352         struct iwl_rxon_context *tmp, *ctx = NULL;
1353         int err;
1354
1355         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1356                            vif->type, vif->addr);
1357
1358         mutex_lock(&priv->mutex);
1359
1360         if (!iwl_legacy_is_ready_rf(priv)) {
1361                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1362                 err = -EINVAL;
1363                 goto out;
1364         }
1365
1366         for_each_context(priv, tmp) {
1367                 u32 possible_modes =
1368                         tmp->interface_modes | tmp->exclusive_interface_modes;
1369
1370                 if (tmp->vif) {
1371                         /* check if this busy context is exclusive */
1372                         if (tmp->exclusive_interface_modes &
1373                                                 BIT(tmp->vif->type)) {
1374                                 err = -EINVAL;
1375                                 goto out;
1376                         }
1377                         continue;
1378                 }
1379
1380                 if (!(possible_modes & BIT(vif->type)))
1381                         continue;
1382
1383                 /* have maybe usable context w/o interface */
1384                 ctx = tmp;
1385                 break;
1386         }
1387
1388         if (!ctx) {
1389                 err = -EOPNOTSUPP;
1390                 goto out;
1391         }
1392
1393         vif_priv->ctx = ctx;
1394         ctx->vif = vif;
1395
1396         err = iwl_legacy_setup_interface(priv, ctx);
1397         if (!err)
1398                 goto out;
1399
1400         ctx->vif = NULL;
1401         priv->iw_mode = NL80211_IFTYPE_STATION;
1402  out:
1403         mutex_unlock(&priv->mutex);
1404
1405         IWL_DEBUG_MAC80211(priv, "leave\n");
1406         return err;
1407 }
1408 EXPORT_SYMBOL(iwl_legacy_mac_add_interface);
1409
1410 static void iwl_legacy_teardown_interface(struct iwl_priv *priv,
1411                                    struct ieee80211_vif *vif,
1412                                    bool mode_change)
1413 {
1414         struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1415
1416         lockdep_assert_held(&priv->mutex);
1417
1418         if (priv->scan_vif == vif) {
1419                 iwl_legacy_scan_cancel_timeout(priv, 200);
1420                 iwl_legacy_force_scan_end(priv);
1421         }
1422
1423         if (!mode_change) {
1424                 iwl_legacy_set_mode(priv, ctx);
1425                 if (!ctx->always_active)
1426                         ctx->is_active = false;
1427         }
1428 }
1429
1430 void iwl_legacy_mac_remove_interface(struct ieee80211_hw *hw,
1431                               struct ieee80211_vif *vif)
1432 {
1433         struct iwl_priv *priv = hw->priv;
1434         struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1435
1436         IWL_DEBUG_MAC80211(priv, "enter\n");
1437
1438         mutex_lock(&priv->mutex);
1439
1440         WARN_ON(ctx->vif != vif);
1441         ctx->vif = NULL;
1442
1443         iwl_legacy_teardown_interface(priv, vif, false);
1444
1445         memset(priv->bssid, 0, ETH_ALEN);
1446         mutex_unlock(&priv->mutex);
1447
1448         IWL_DEBUG_MAC80211(priv, "leave\n");
1449
1450 }
1451 EXPORT_SYMBOL(iwl_legacy_mac_remove_interface);
1452
1453 int iwl_legacy_alloc_txq_mem(struct iwl_priv *priv)
1454 {
1455         if (!priv->txq)
1456                 priv->txq = kzalloc(
1457                         sizeof(struct iwl_tx_queue) *
1458                                 priv->cfg->base_params->num_of_queues,
1459                         GFP_KERNEL);
1460         if (!priv->txq) {
1461                 IWL_ERR(priv, "Not enough memory for txq\n");
1462                 return -ENOMEM;
1463         }
1464         return 0;
1465 }
1466 EXPORT_SYMBOL(iwl_legacy_alloc_txq_mem);
1467
1468 void iwl_legacy_txq_mem(struct iwl_priv *priv)
1469 {
1470         kfree(priv->txq);
1471         priv->txq = NULL;
1472 }
1473 EXPORT_SYMBOL(iwl_legacy_txq_mem);
1474
1475 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
1476
1477 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
1478
1479 void iwl_legacy_reset_traffic_log(struct iwl_priv *priv)
1480 {
1481         priv->tx_traffic_idx = 0;
1482         priv->rx_traffic_idx = 0;
1483         if (priv->tx_traffic)
1484                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1485         if (priv->rx_traffic)
1486                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
1487 }
1488
1489 int iwl_legacy_alloc_traffic_mem(struct iwl_priv *priv)
1490 {
1491         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
1492
1493         if (iwlegacy_debug_level & IWL_DL_TX) {
1494                 if (!priv->tx_traffic) {
1495                         priv->tx_traffic =
1496                                 kzalloc(traffic_size, GFP_KERNEL);
1497                         if (!priv->tx_traffic)
1498                                 return -ENOMEM;
1499                 }
1500         }
1501         if (iwlegacy_debug_level & IWL_DL_RX) {
1502                 if (!priv->rx_traffic) {
1503                         priv->rx_traffic =
1504                                 kzalloc(traffic_size, GFP_KERNEL);
1505                         if (!priv->rx_traffic)
1506                                 return -ENOMEM;
1507                 }
1508         }
1509         iwl_legacy_reset_traffic_log(priv);
1510         return 0;
1511 }
1512 EXPORT_SYMBOL(iwl_legacy_alloc_traffic_mem);
1513
1514 void iwl_legacy_free_traffic_mem(struct iwl_priv *priv)
1515 {
1516         kfree(priv->tx_traffic);
1517         priv->tx_traffic = NULL;
1518
1519         kfree(priv->rx_traffic);
1520         priv->rx_traffic = NULL;
1521 }
1522 EXPORT_SYMBOL(iwl_legacy_free_traffic_mem);
1523
1524 void iwl_legacy_dbg_log_tx_data_frame(struct iwl_priv *priv,
1525                       u16 length, struct ieee80211_hdr *header)
1526 {
1527         __le16 fc;
1528         u16 len;
1529
1530         if (likely(!(iwlegacy_debug_level & IWL_DL_TX)))
1531                 return;
1532
1533         if (!priv->tx_traffic)
1534                 return;
1535
1536         fc = header->frame_control;
1537         if (ieee80211_is_data(fc)) {
1538                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1539                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
1540                 memcpy((priv->tx_traffic +
1541                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1542                        header, len);
1543                 priv->tx_traffic_idx =
1544                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1545         }
1546 }
1547 EXPORT_SYMBOL(iwl_legacy_dbg_log_tx_data_frame);
1548
1549 void iwl_legacy_dbg_log_rx_data_frame(struct iwl_priv *priv,
1550                       u16 length, struct ieee80211_hdr *header)
1551 {
1552         __le16 fc;
1553         u16 len;
1554
1555         if (likely(!(iwlegacy_debug_level & IWL_DL_RX)))
1556                 return;
1557
1558         if (!priv->rx_traffic)
1559                 return;
1560
1561         fc = header->frame_control;
1562         if (ieee80211_is_data(fc)) {
1563                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
1564                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
1565                 memcpy((priv->rx_traffic +
1566                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
1567                        header, len);
1568                 priv->rx_traffic_idx =
1569                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
1570         }
1571 }
1572 EXPORT_SYMBOL(iwl_legacy_dbg_log_rx_data_frame);
1573
1574 const char *iwl_legacy_get_mgmt_string(int cmd)
1575 {
1576         switch (cmd) {
1577                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
1578                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
1579                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
1580                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
1581                 IWL_CMD(MANAGEMENT_PROBE_REQ);
1582                 IWL_CMD(MANAGEMENT_PROBE_RESP);
1583                 IWL_CMD(MANAGEMENT_BEACON);
1584                 IWL_CMD(MANAGEMENT_ATIM);
1585                 IWL_CMD(MANAGEMENT_DISASSOC);
1586                 IWL_CMD(MANAGEMENT_AUTH);
1587                 IWL_CMD(MANAGEMENT_DEAUTH);
1588                 IWL_CMD(MANAGEMENT_ACTION);
1589         default:
1590                 return "UNKNOWN";
1591
1592         }
1593 }
1594
1595 const char *iwl_legacy_get_ctrl_string(int cmd)
1596 {
1597         switch (cmd) {
1598                 IWL_CMD(CONTROL_BACK_REQ);
1599                 IWL_CMD(CONTROL_BACK);
1600                 IWL_CMD(CONTROL_PSPOLL);
1601                 IWL_CMD(CONTROL_RTS);
1602                 IWL_CMD(CONTROL_CTS);
1603                 IWL_CMD(CONTROL_ACK);
1604                 IWL_CMD(CONTROL_CFEND);
1605                 IWL_CMD(CONTROL_CFENDACK);
1606         default:
1607                 return "UNKNOWN";
1608
1609         }
1610 }
1611
1612 void iwl_legacy_clear_traffic_stats(struct iwl_priv *priv)
1613 {
1614         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
1615         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
1616 }
1617
1618 /*
1619  * if CONFIG_IWLWIFI_LEGACY_DEBUGFS defined,
1620  * iwl_legacy_update_stats function will
1621  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass
1622  * Use debugFs to display the rx/rx_statistics
1623  * if CONFIG_IWLWIFI_LEGACY_DEBUGFS not being defined, then no MGMT and CTRL
1624  * information will be recorded, but DATA pkt still will be recorded
1625  * for the reason of iwl_led.c need to control the led blinking based on
1626  * number of tx and rx data.
1627  *
1628  */
1629 void
1630 iwl_legacy_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
1631 {
1632         struct traffic_stats    *stats;
1633
1634         if (is_tx)
1635                 stats = &priv->tx_stats;
1636         else
1637                 stats = &priv->rx_stats;
1638
1639         if (ieee80211_is_mgmt(fc)) {
1640                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1641                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
1642                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
1643                         break;
1644                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
1645                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
1646                         break;
1647                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
1648                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
1649                         break;
1650                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
1651                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
1652                         break;
1653                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
1654                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
1655                         break;
1656                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
1657                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
1658                         break;
1659                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
1660                         stats->mgmt[MANAGEMENT_BEACON]++;
1661                         break;
1662                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
1663                         stats->mgmt[MANAGEMENT_ATIM]++;
1664                         break;
1665                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
1666                         stats->mgmt[MANAGEMENT_DISASSOC]++;
1667                         break;
1668                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
1669                         stats->mgmt[MANAGEMENT_AUTH]++;
1670                         break;
1671                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
1672                         stats->mgmt[MANAGEMENT_DEAUTH]++;
1673                         break;
1674                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
1675                         stats->mgmt[MANAGEMENT_ACTION]++;
1676                         break;
1677                 }
1678         } else if (ieee80211_is_ctl(fc)) {
1679                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
1680                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
1681                         stats->ctrl[CONTROL_BACK_REQ]++;
1682                         break;
1683                 case cpu_to_le16(IEEE80211_STYPE_BACK):
1684                         stats->ctrl[CONTROL_BACK]++;
1685                         break;
1686                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
1687                         stats->ctrl[CONTROL_PSPOLL]++;
1688                         break;
1689                 case cpu_to_le16(IEEE80211_STYPE_RTS):
1690                         stats->ctrl[CONTROL_RTS]++;
1691                         break;
1692                 case cpu_to_le16(IEEE80211_STYPE_CTS):
1693                         stats->ctrl[CONTROL_CTS]++;
1694                         break;
1695                 case cpu_to_le16(IEEE80211_STYPE_ACK):
1696                         stats->ctrl[CONTROL_ACK]++;
1697                         break;
1698                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
1699                         stats->ctrl[CONTROL_CFEND]++;
1700                         break;
1701                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
1702                         stats->ctrl[CONTROL_CFENDACK]++;
1703                         break;
1704                 }
1705         } else {
1706                 /* data */
1707                 stats->data_cnt++;
1708                 stats->data_bytes += len;
1709         }
1710 }
1711 EXPORT_SYMBOL(iwl_legacy_update_stats);
1712 #endif
1713
1714 static void _iwl_legacy_force_rf_reset(struct iwl_priv *priv)
1715 {
1716         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1717                 return;
1718
1719         if (!iwl_legacy_is_any_associated(priv)) {
1720                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
1721                 return;
1722         }
1723         /*
1724          * There is no easy and better way to force reset the radio,
1725          * the only known method is switching channel which will force to
1726          * reset and tune the radio.
1727          * Use internal short scan (single channel) operation to should
1728          * achieve this objective.
1729          * Driver should reset the radio when number of consecutive missed
1730          * beacon, or any other uCode error condition detected.
1731          */
1732         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
1733         iwl_legacy_internal_short_hw_scan(priv);
1734 }
1735
1736
1737 int iwl_legacy_force_reset(struct iwl_priv *priv, int mode, bool external)
1738 {
1739         struct iwl_force_reset *force_reset;
1740
1741         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1742                 return -EINVAL;
1743
1744         if (mode >= IWL_MAX_FORCE_RESET) {
1745                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
1746                 return -EINVAL;
1747         }
1748         force_reset = &priv->force_reset[mode];
1749         force_reset->reset_request_count++;
1750         if (!external) {
1751                 if (force_reset->last_force_reset_jiffies &&
1752                     time_after(force_reset->last_force_reset_jiffies +
1753                     force_reset->reset_duration, jiffies)) {
1754                         IWL_DEBUG_INFO(priv, "force reset rejected\n");
1755                         force_reset->reset_reject_count++;
1756                         return -EAGAIN;
1757                 }
1758         }
1759         force_reset->reset_success_count++;
1760         force_reset->last_force_reset_jiffies = jiffies;
1761         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
1762         switch (mode) {
1763         case IWL_RF_RESET:
1764                 _iwl_legacy_force_rf_reset(priv);
1765                 break;
1766         case IWL_FW_RESET:
1767                 /*
1768                  * if the request is from external(ex: debugfs),
1769                  * then always perform the request in regardless the module
1770                  * parameter setting
1771                  * if the request is from internal (uCode error or driver
1772                  * detect failure), then fw_restart module parameter
1773                  * need to be check before performing firmware reload
1774                  */
1775                 if (!external && !priv->cfg->mod_params->restart_fw) {
1776                         IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
1777                                        "module parameter setting\n");
1778                         break;
1779                 }
1780                 IWL_ERR(priv, "On demand firmware reload\n");
1781                 /* Set the FW error flag -- cleared on iwl_down */
1782                 set_bit(STATUS_FW_ERROR, &priv->status);
1783                 wake_up_interruptible(&priv->wait_command_queue);
1784                 /*
1785                  * Keep the restart process from trying to send host
1786                  * commands by clearing the INIT status bit
1787                  */
1788                 clear_bit(STATUS_READY, &priv->status);
1789                 queue_work(priv->workqueue, &priv->restart);
1790                 break;
1791         }
1792         return 0;
1793 }
1794
1795 int
1796 iwl_legacy_mac_change_interface(struct ieee80211_hw *hw,
1797                         struct ieee80211_vif *vif,
1798                         enum nl80211_iftype newtype, bool newp2p)
1799 {
1800         struct iwl_priv *priv = hw->priv;
1801         struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
1802         struct iwl_rxon_context *tmp;
1803         u32 interface_modes;
1804         int err;
1805
1806         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1807
1808         mutex_lock(&priv->mutex);
1809
1810         if (!ctx->vif || !iwl_legacy_is_ready_rf(priv)) {
1811                 /*
1812                  * Huh? But wait ... this can maybe happen when
1813                  * we're in the middle of a firmware restart!
1814                  */
1815                 err = -EBUSY;
1816                 goto out;
1817         }
1818
1819         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1820
1821         if (!(interface_modes & BIT(newtype))) {
1822                 err = -EBUSY;
1823                 goto out;
1824         }
1825
1826         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1827                 for_each_context(priv, tmp) {
1828                         if (ctx == tmp)
1829                                 continue;
1830
1831                         if (!tmp->vif)
1832                                 continue;
1833
1834                         /*
1835                          * The current mode switch would be exclusive, but
1836                          * another context is active ... refuse the switch.
1837                          */
1838                         err = -EBUSY;
1839                         goto out;
1840                 }
1841         }
1842
1843         /* success */
1844         iwl_legacy_teardown_interface(priv, vif, true);
1845         vif->type = newtype;
1846         vif->p2p = newp2p;
1847         err = iwl_legacy_setup_interface(priv, ctx);
1848         WARN_ON(err);
1849         /*
1850          * We've switched internally, but submitting to the
1851          * device may have failed for some reason. Mask this
1852          * error, because otherwise mac80211 will not switch
1853          * (and set the interface type back) and we'll be
1854          * out of sync with it.
1855          */
1856         err = 0;
1857
1858  out:
1859         mutex_unlock(&priv->mutex);
1860         return err;
1861 }
1862 EXPORT_SYMBOL(iwl_legacy_mac_change_interface);
1863
1864 /*
1865  * On every watchdog tick we check (latest) time stamp. If it does not
1866  * change during timeout period and queue is not empty we reset firmware.
1867  */
1868 static int iwl_legacy_check_stuck_queue(struct iwl_priv *priv, int cnt)
1869 {
1870         struct iwl_tx_queue *txq = &priv->txq[cnt];
1871         struct iwl_queue *q = &txq->q;
1872         unsigned long timeout;
1873         int ret;
1874
1875         if (q->read_ptr == q->write_ptr) {
1876                 txq->time_stamp = jiffies;
1877                 return 0;
1878         }
1879
1880         timeout = txq->time_stamp +
1881                   msecs_to_jiffies(priv->cfg->base_params->wd_timeout);
1882
1883         if (time_after(jiffies, timeout)) {
1884                 IWL_ERR(priv, "Queue %d stuck for %u ms.\n",
1885                                 q->id, priv->cfg->base_params->wd_timeout);
1886                 ret = iwl_legacy_force_reset(priv, IWL_FW_RESET, false);
1887                 return (ret == -EAGAIN) ? 0 : 1;
1888         }
1889
1890         return 0;
1891 }
1892
1893 /*
1894  * Making watchdog tick be a quarter of timeout assure we will
1895  * discover the queue hung between timeout and 1.25*timeout
1896  */
1897 #define IWL_WD_TICK(timeout) ((timeout) / 4)
1898
1899 /*
1900  * Watchdog timer callback, we check each tx queue for stuck, if if hung
1901  * we reset the firmware. If everything is fine just rearm the timer.
1902  */
1903 void iwl_legacy_bg_watchdog(unsigned long data)
1904 {
1905         struct iwl_priv *priv = (struct iwl_priv *)data;
1906         int cnt;
1907         unsigned long timeout;
1908
1909         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1910                 return;
1911
1912         timeout = priv->cfg->base_params->wd_timeout;
1913         if (timeout == 0)
1914                 return;
1915
1916         /* monitor and check for stuck cmd queue */
1917         if (iwl_legacy_check_stuck_queue(priv, priv->cmd_queue))
1918                 return;
1919
1920         /* monitor and check for other stuck queues */
1921         if (iwl_legacy_is_any_associated(priv)) {
1922                 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
1923                         /* skip as we already checked the command queue */
1924                         if (cnt == priv->cmd_queue)
1925                                 continue;
1926                         if (iwl_legacy_check_stuck_queue(priv, cnt))
1927                                 return;
1928                 }
1929         }
1930
1931         mod_timer(&priv->watchdog, jiffies +
1932                   msecs_to_jiffies(IWL_WD_TICK(timeout)));
1933 }
1934 EXPORT_SYMBOL(iwl_legacy_bg_watchdog);
1935
1936 void iwl_legacy_setup_watchdog(struct iwl_priv *priv)
1937 {
1938         unsigned int timeout = priv->cfg->base_params->wd_timeout;
1939
1940         if (timeout)
1941                 mod_timer(&priv->watchdog,
1942                           jiffies + msecs_to_jiffies(IWL_WD_TICK(timeout)));
1943         else
1944                 del_timer(&priv->watchdog);
1945 }
1946 EXPORT_SYMBOL(iwl_legacy_setup_watchdog);
1947
1948 /*
1949  * extended beacon time format
1950  * time in usec will be changed into a 32-bit value in extended:internal format
1951  * the extended part is the beacon counts
1952  * the internal part is the time in usec within one beacon interval
1953  */
1954 u32
1955 iwl_legacy_usecs_to_beacons(struct iwl_priv *priv,
1956                                         u32 usec, u32 beacon_interval)
1957 {
1958         u32 quot;
1959         u32 rem;
1960         u32 interval = beacon_interval * TIME_UNIT;
1961
1962         if (!interval || !usec)
1963                 return 0;
1964
1965         quot = (usec / interval) &
1966                 (iwl_legacy_beacon_time_mask_high(priv,
1967                 priv->hw_params.beacon_time_tsf_bits) >>
1968                 priv->hw_params.beacon_time_tsf_bits);
1969         rem = (usec % interval) & iwl_legacy_beacon_time_mask_low(priv,
1970                                    priv->hw_params.beacon_time_tsf_bits);
1971
1972         return (quot << priv->hw_params.beacon_time_tsf_bits) + rem;
1973 }
1974 EXPORT_SYMBOL(iwl_legacy_usecs_to_beacons);
1975
1976 /* base is usually what we get from ucode with each received frame,
1977  * the same as HW timer counter counting down
1978  */
1979 __le32 iwl_legacy_add_beacon_time(struct iwl_priv *priv, u32 base,
1980                            u32 addon, u32 beacon_interval)
1981 {
1982         u32 base_low = base & iwl_legacy_beacon_time_mask_low(priv,
1983                                         priv->hw_params.beacon_time_tsf_bits);
1984         u32 addon_low = addon & iwl_legacy_beacon_time_mask_low(priv,
1985                                         priv->hw_params.beacon_time_tsf_bits);
1986         u32 interval = beacon_interval * TIME_UNIT;
1987         u32 res = (base & iwl_legacy_beacon_time_mask_high(priv,
1988                                 priv->hw_params.beacon_time_tsf_bits)) +
1989                                 (addon & iwl_legacy_beacon_time_mask_high(priv,
1990                                 priv->hw_params.beacon_time_tsf_bits));
1991
1992         if (base_low > addon_low)
1993                 res += base_low - addon_low;
1994         else if (base_low < addon_low) {
1995                 res += interval + base_low - addon_low;
1996                 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1997         } else
1998                 res += (1 << priv->hw_params.beacon_time_tsf_bits);
1999
2000         return cpu_to_le32(res);
2001 }
2002 EXPORT_SYMBOL(iwl_legacy_add_beacon_time);
2003
2004 #ifdef CONFIG_PM
2005
2006 int iwl_legacy_pci_suspend(struct device *device)
2007 {
2008         struct pci_dev *pdev = to_pci_dev(device);
2009         struct iwl_priv *priv = pci_get_drvdata(pdev);
2010
2011         /*
2012          * This function is called when system goes into suspend state
2013          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2014          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2015          * it will not call apm_ops.stop() to stop the DMA operation.
2016          * Calling apm_ops.stop here to make sure we stop the DMA.
2017          */
2018         iwl_legacy_apm_stop(priv);
2019
2020         return 0;
2021 }
2022 EXPORT_SYMBOL(iwl_legacy_pci_suspend);
2023
2024 int iwl_legacy_pci_resume(struct device *device)
2025 {
2026         struct pci_dev *pdev = to_pci_dev(device);
2027         struct iwl_priv *priv = pci_get_drvdata(pdev);
2028         bool hw_rfkill = false;
2029
2030         /*
2031          * We disable the RETRY_TIMEOUT register (0x41) to keep
2032          * PCI Tx retries from interfering with C3 CPU state.
2033          */
2034         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2035
2036         iwl_legacy_enable_interrupts(priv);
2037
2038         if (!(iwl_read32(priv, CSR_GP_CNTRL) &
2039                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
2040                 hw_rfkill = true;
2041
2042         if (hw_rfkill)
2043                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2044         else
2045                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2046
2047         wiphy_rfkill_set_hw_state(priv->hw->wiphy, hw_rfkill);
2048
2049         return 0;
2050 }
2051 EXPORT_SYMBOL(iwl_legacy_pci_resume);
2052
2053 const struct dev_pm_ops iwl_legacy_pm_ops = {
2054         .suspend = iwl_legacy_pci_suspend,
2055         .resume = iwl_legacy_pci_resume,
2056         .freeze = iwl_legacy_pci_suspend,
2057         .thaw = iwl_legacy_pci_resume,
2058         .poweroff = iwl_legacy_pci_suspend,
2059         .restore = iwl_legacy_pci_resume,
2060 };
2061 EXPORT_SYMBOL(iwl_legacy_pm_ops);
2062
2063 #endif /* CONFIG_PM */
2064
2065 static void
2066 iwl_legacy_update_qos(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
2067 {
2068         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2069                 return;
2070
2071         if (!ctx->is_active)
2072                 return;
2073
2074         ctx->qos_data.def_qos_parm.qos_flags = 0;
2075
2076         if (ctx->qos_data.qos_active)
2077                 ctx->qos_data.def_qos_parm.qos_flags |=
2078                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2079
2080         if (ctx->ht.enabled)
2081                 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
2082
2083         IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
2084                       ctx->qos_data.qos_active,
2085                       ctx->qos_data.def_qos_parm.qos_flags);
2086
2087         iwl_legacy_send_cmd_pdu_async(priv, ctx->qos_cmd,
2088                                sizeof(struct iwl_qosparam_cmd),
2089                                &ctx->qos_data.def_qos_parm, NULL);
2090 }
2091
2092 /**
2093  * iwl_legacy_mac_config - mac80211 config callback
2094  */
2095 int iwl_legacy_mac_config(struct ieee80211_hw *hw, u32 changed)
2096 {
2097         struct iwl_priv *priv = hw->priv;
2098         const struct iwl_channel_info *ch_info;
2099         struct ieee80211_conf *conf = &hw->conf;
2100         struct ieee80211_channel *channel = conf->channel;
2101         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2102         struct iwl_rxon_context *ctx;
2103         unsigned long flags = 0;
2104         int ret = 0;
2105         u16 ch;
2106         int scan_active = 0;
2107         bool ht_changed[NUM_IWL_RXON_CTX] = {};
2108
2109         if (WARN_ON(!priv->cfg->ops->legacy))
2110                 return -EOPNOTSUPP;
2111
2112         mutex_lock(&priv->mutex);
2113
2114         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2115                                         channel->hw_value, changed);
2116
2117         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
2118                 scan_active = 1;
2119                 IWL_DEBUG_MAC80211(priv, "scan active\n");
2120         }
2121
2122         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2123                        IEEE80211_CONF_CHANGE_CHANNEL)) {
2124                 /* mac80211 uses static for non-HT which is what we want */
2125                 priv->current_ht_config.smps = conf->smps_mode;
2126
2127                 /*
2128                  * Recalculate chain counts.
2129                  *
2130                  * If monitor mode is enabled then mac80211 will
2131                  * set up the SM PS mode to OFF if an HT channel is
2132                  * configured.
2133                  */
2134                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2135                         for_each_context(priv, ctx)
2136                                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2137         }
2138
2139         /* during scanning mac80211 will delay channel setting until
2140          * scan finish with changed = 0
2141          */
2142         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2143                 if (scan_active)
2144                         goto set_ch_out;
2145
2146                 ch = channel->hw_value;
2147                 ch_info = iwl_legacy_get_channel_info(priv, channel->band, ch);
2148                 if (!iwl_legacy_is_channel_valid(ch_info)) {
2149                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2150                         ret = -EINVAL;
2151                         goto set_ch_out;
2152                 }
2153
2154                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2155                     !iwl_legacy_is_channel_ibss(ch_info)) {
2156                         IWL_DEBUG_MAC80211(priv, "leave - not IBSS channel\n");
2157                         ret = -EINVAL;
2158                         goto set_ch_out;
2159                 }
2160
2161                 spin_lock_irqsave(&priv->lock, flags);
2162
2163                 for_each_context(priv, ctx) {
2164                         /* Configure HT40 channels */
2165                         if (ctx->ht.enabled != conf_is_ht(conf)) {
2166                                 ctx->ht.enabled = conf_is_ht(conf);
2167                                 ht_changed[ctx->ctxid] = true;
2168                         }
2169                         if (ctx->ht.enabled) {
2170                                 if (conf_is_ht40_minus(conf)) {
2171                                         ctx->ht.extension_chan_offset =
2172                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2173                                         ctx->ht.is_40mhz = true;
2174                                 } else if (conf_is_ht40_plus(conf)) {
2175                                         ctx->ht.extension_chan_offset =
2176                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2177                                         ctx->ht.is_40mhz = true;
2178                                 } else {
2179                                         ctx->ht.extension_chan_offset =
2180                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2181                                         ctx->ht.is_40mhz = false;
2182                                 }
2183                         } else
2184                                 ctx->ht.is_40mhz = false;
2185
2186                         /*
2187                          * Default to no protection. Protection mode will
2188                          * later be set from BSS config in iwl_ht_conf
2189                          */
2190                         ctx->ht.protection =
2191                                         IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2192
2193                         /* if we are switching from ht to 2.4 clear flags
2194                          * from any ht related info since 2.4 does not
2195                          * support ht */
2196                         if ((le16_to_cpu(ctx->staging.channel) != ch))
2197                                 ctx->staging.flags = 0;
2198
2199                         iwl_legacy_set_rxon_channel(priv, channel, ctx);
2200                         iwl_legacy_set_rxon_ht(priv, ht_conf);
2201
2202                         iwl_legacy_set_flags_for_band(priv, ctx, channel->band,
2203                                                ctx->vif);
2204                 }
2205
2206                 spin_unlock_irqrestore(&priv->lock, flags);
2207
2208                 if (priv->cfg->ops->legacy->update_bcast_stations)
2209                         ret =
2210                         priv->cfg->ops->legacy->update_bcast_stations(priv);
2211
2212  set_ch_out:
2213                 /* The list of supported rates and rate mask can be different
2214                  * for each band; since the band may have changed, reset
2215                  * the rate mask to what mac80211 lists */
2216                 iwl_legacy_set_rate(priv);
2217         }
2218
2219         if (changed & (IEEE80211_CONF_CHANGE_PS |
2220                         IEEE80211_CONF_CHANGE_IDLE)) {
2221                 ret = iwl_legacy_power_update_mode(priv, false);
2222                 if (ret)
2223                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2224         }
2225
2226         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2227                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2228                         priv->tx_power_user_lmt, conf->power_level);
2229
2230                 iwl_legacy_set_tx_power(priv, conf->power_level, false);
2231         }
2232
2233         if (!iwl_legacy_is_ready(priv)) {
2234                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2235                 goto out;
2236         }
2237
2238         if (scan_active)
2239                 goto out;
2240
2241         for_each_context(priv, ctx) {
2242                 if (memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging)))
2243                         iwl_legacy_commit_rxon(priv, ctx);
2244                 else
2245                         IWL_DEBUG_INFO(priv,
2246                                 "Not re-sending same RXON configuration.\n");
2247                 if (ht_changed[ctx->ctxid])
2248                         iwl_legacy_update_qos(priv, ctx);
2249         }
2250
2251 out:
2252         IWL_DEBUG_MAC80211(priv, "leave\n");
2253         mutex_unlock(&priv->mutex);
2254         return ret;
2255 }
2256 EXPORT_SYMBOL(iwl_legacy_mac_config);
2257
2258 void iwl_legacy_mac_reset_tsf(struct ieee80211_hw *hw)
2259 {
2260         struct iwl_priv *priv = hw->priv;
2261         unsigned long flags;
2262         /* IBSS can only be the IWL_RXON_CTX_BSS context */
2263         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2264
2265         if (WARN_ON(!priv->cfg->ops->legacy))
2266                 return;
2267
2268         mutex_lock(&priv->mutex);
2269         IWL_DEBUG_MAC80211(priv, "enter\n");
2270
2271         spin_lock_irqsave(&priv->lock, flags);
2272         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2273         spin_unlock_irqrestore(&priv->lock, flags);
2274
2275         spin_lock_irqsave(&priv->lock, flags);
2276
2277         /* new association get rid of ibss beacon skb */
2278         if (priv->beacon_skb)
2279                 dev_kfree_skb(priv->beacon_skb);
2280
2281         priv->beacon_skb = NULL;
2282
2283         priv->timestamp = 0;
2284
2285         spin_unlock_irqrestore(&priv->lock, flags);
2286
2287         iwl_legacy_scan_cancel_timeout(priv, 100);
2288         if (!iwl_legacy_is_ready_rf(priv)) {
2289                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2290                 mutex_unlock(&priv->mutex);
2291                 return;
2292         }
2293
2294         /* we are restarting association process
2295          * clear RXON_FILTER_ASSOC_MSK bit
2296          */
2297         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2298         iwl_legacy_commit_rxon(priv, ctx);
2299
2300         iwl_legacy_set_rate(priv);
2301
2302         mutex_unlock(&priv->mutex);
2303
2304         IWL_DEBUG_MAC80211(priv, "leave\n");
2305 }
2306 EXPORT_SYMBOL(iwl_legacy_mac_reset_tsf);
2307
2308 static void iwl_legacy_ht_conf(struct iwl_priv *priv,
2309                         struct ieee80211_vif *vif)
2310 {
2311         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2312         struct ieee80211_sta *sta;
2313         struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
2314         struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2315
2316         IWL_DEBUG_ASSOC(priv, "enter:\n");
2317
2318         if (!ctx->ht.enabled)
2319                 return;
2320
2321         ctx->ht.protection =
2322                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2323         ctx->ht.non_gf_sta_present =
2324                 !!(bss_conf->ht_operation_mode &
2325                                 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2326
2327         ht_conf->single_chain_sufficient = false;
2328
2329         switch (vif->type) {
2330         case NL80211_IFTYPE_STATION:
2331                 rcu_read_lock();
2332                 sta = ieee80211_find_sta(vif, bss_conf->bssid);
2333                 if (sta) {
2334                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
2335                         int maxstreams;
2336
2337                         maxstreams = (ht_cap->mcs.tx_params &
2338                               IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
2339                                 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2340                         maxstreams += 1;
2341
2342                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
2343                             (ht_cap->mcs.rx_mask[2] == 0))
2344                                 ht_conf->single_chain_sufficient = true;
2345                         if (maxstreams <= 1)
2346                                 ht_conf->single_chain_sufficient = true;
2347                 } else {
2348                         /*
2349                          * If at all, this can only happen through a race
2350                          * when the AP disconnects us while we're still
2351                          * setting up the connection, in that case mac80211
2352                          * will soon tell us about that.
2353                          */
2354                         ht_conf->single_chain_sufficient = true;
2355                 }
2356                 rcu_read_unlock();
2357                 break;
2358         case NL80211_IFTYPE_ADHOC:
2359                 ht_conf->single_chain_sufficient = true;
2360                 break;
2361         default:
2362                 break;
2363         }
2364
2365         IWL_DEBUG_ASSOC(priv, "leave\n");
2366 }
2367
2368 static inline void iwl_legacy_set_no_assoc(struct iwl_priv *priv,
2369                                     struct ieee80211_vif *vif)
2370 {
2371         struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2372
2373         /*
2374          * inform the ucode that there is no longer an
2375          * association and that no more packets should be
2376          * sent
2377          */
2378         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2379         ctx->staging.assoc_id = 0;
2380         iwl_legacy_commit_rxon(priv, ctx);
2381 }
2382
2383 static void iwl_legacy_beacon_update(struct ieee80211_hw *hw,
2384                                   struct ieee80211_vif *vif)
2385 {
2386         struct iwl_priv *priv = hw->priv;
2387         unsigned long flags;
2388         __le64 timestamp;
2389         struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
2390
2391         if (!skb)
2392                 return;
2393
2394         IWL_DEBUG_MAC80211(priv, "enter\n");
2395
2396         lockdep_assert_held(&priv->mutex);
2397
2398         if (!priv->beacon_ctx) {
2399                 IWL_ERR(priv, "update beacon but no beacon context!\n");
2400                 dev_kfree_skb(skb);
2401                 return;
2402         }
2403
2404         spin_lock_irqsave(&priv->lock, flags);
2405
2406         if (priv->beacon_skb)
2407                 dev_kfree_skb(priv->beacon_skb);
2408
2409         priv->beacon_skb = skb;
2410
2411         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2412         priv->timestamp = le64_to_cpu(timestamp);
2413
2414         IWL_DEBUG_MAC80211(priv, "leave\n");
2415         spin_unlock_irqrestore(&priv->lock, flags);
2416
2417         if (!iwl_legacy_is_ready_rf(priv)) {
2418                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2419                 return;
2420         }
2421
2422         priv->cfg->ops->legacy->post_associate(priv);
2423 }
2424
2425 void iwl_legacy_mac_bss_info_changed(struct ieee80211_hw *hw,
2426                                      struct ieee80211_vif *vif,
2427                                      struct ieee80211_bss_conf *bss_conf,
2428                                      u32 changes)
2429 {
2430         struct iwl_priv *priv = hw->priv;
2431         struct iwl_rxon_context *ctx = iwl_legacy_rxon_ctx_from_vif(vif);
2432         int ret;
2433
2434         if (WARN_ON(!priv->cfg->ops->legacy))
2435                 return;
2436
2437         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2438
2439         mutex_lock(&priv->mutex);
2440
2441         if (!iwl_legacy_is_alive(priv)) {
2442                 mutex_unlock(&priv->mutex);
2443                 return;
2444         }
2445
2446         if (changes & BSS_CHANGED_QOS) {
2447                 unsigned long flags;
2448
2449                 spin_lock_irqsave(&priv->lock, flags);
2450                 ctx->qos_data.qos_active = bss_conf->qos;
2451                 iwl_legacy_update_qos(priv, ctx);
2452                 spin_unlock_irqrestore(&priv->lock, flags);
2453         }
2454
2455         if (changes & BSS_CHANGED_BEACON_ENABLED) {
2456                 /*
2457                  * the add_interface code must make sure we only ever
2458                  * have a single interface that could be beaconing at
2459                  * any time.
2460                  */
2461                 if (vif->bss_conf.enable_beacon)
2462                         priv->beacon_ctx = ctx;
2463                 else
2464                         priv->beacon_ctx = NULL;
2465         }
2466
2467         if (changes & BSS_CHANGED_BSSID) {
2468                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
2469
2470                 /*
2471                  * If there is currently a HW scan going on in the
2472                  * background then we need to cancel it else the RXON
2473                  * below/in post_associate will fail.
2474                  */
2475                 if (iwl_legacy_scan_cancel_timeout(priv, 100)) {
2476                         IWL_WARN(priv,
2477                                 "Aborted scan still in progress after 100ms\n");
2478                         IWL_DEBUG_MAC80211(priv,
2479                                 "leaving - scan abort failed.\n");
2480                         mutex_unlock(&priv->mutex);
2481                         return;
2482                 }
2483
2484                 /* mac80211 only sets assoc when in STATION mode */
2485                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
2486                         memcpy(ctx->staging.bssid_addr,
2487                                bss_conf->bssid, ETH_ALEN);
2488
2489                         /* currently needed in a few places */
2490                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2491                 } else {
2492                         ctx->staging.filter_flags &=
2493                                 ~RXON_FILTER_ASSOC_MSK;
2494                 }
2495
2496         }
2497
2498         /*
2499          * This needs to be after setting the BSSID in case
2500          * mac80211 decides to do both changes at once because
2501          * it will invoke post_associate.
2502          */
2503         if (vif->type == NL80211_IFTYPE_ADHOC && changes & BSS_CHANGED_BEACON)
2504                 iwl_legacy_beacon_update(hw, vif);
2505
2506         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2507                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2508                                    bss_conf->use_short_preamble);
2509                 if (bss_conf->use_short_preamble)
2510                         ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2511                 else
2512                         ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2513         }
2514
2515         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2516                 IWL_DEBUG_MAC80211(priv,
2517                         "ERP_CTS %d\n", bss_conf->use_cts_prot);
2518                 if (bss_conf->use_cts_prot &&
2519                         (priv->band != IEEE80211_BAND_5GHZ))
2520                         ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
2521                 else
2522                         ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2523                 if (bss_conf->use_cts_prot)
2524                         ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;
2525                 else
2526                         ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
2527         }
2528
2529         if (changes & BSS_CHANGED_BASIC_RATES) {
2530                 /* XXX use this information
2531                  *
2532                  * To do that, remove code from iwl_legacy_set_rate() and put something
2533                  * like this here:
2534                  *
2535                 if (A-band)
2536                         ctx->staging.ofdm_basic_rates =
2537                                 bss_conf->basic_rates;
2538                 else
2539                         ctx->staging.ofdm_basic_rates =
2540                                 bss_conf->basic_rates >> 4;
2541                         ctx->staging.cck_basic_rates =
2542                                 bss_conf->basic_rates & 0xF;
2543                  */
2544         }
2545
2546         if (changes & BSS_CHANGED_HT) {
2547                 iwl_legacy_ht_conf(priv, vif);
2548
2549                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2550                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2551         }
2552
2553         if (changes & BSS_CHANGED_ASSOC) {
2554                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2555                 if (bss_conf->assoc) {
2556                         priv->timestamp = bss_conf->timestamp;
2557
2558                         if (!iwl_legacy_is_rfkill(priv))
2559                                 priv->cfg->ops->legacy->post_associate(priv);
2560                 } else
2561                         iwl_legacy_set_no_assoc(priv, vif);
2562         }
2563
2564         if (changes && iwl_legacy_is_associated_ctx(ctx) && bss_conf->aid) {
2565                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
2566                                    changes);
2567                 ret = iwl_legacy_send_rxon_assoc(priv, ctx);
2568                 if (!ret) {
2569                         /* Sync active_rxon with latest change. */
2570                         memcpy((void *)&ctx->active,
2571                                 &ctx->staging,
2572                                 sizeof(struct iwl_legacy_rxon_cmd));
2573                 }
2574         }
2575
2576         if (changes & BSS_CHANGED_BEACON_ENABLED) {
2577                 if (vif->bss_conf.enable_beacon) {
2578                         memcpy(ctx->staging.bssid_addr,
2579                                bss_conf->bssid, ETH_ALEN);
2580                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2581                         priv->cfg->ops->legacy->config_ap(priv);
2582                 } else
2583                         iwl_legacy_set_no_assoc(priv, vif);
2584         }
2585
2586         if (changes & BSS_CHANGED_IBSS) {
2587                 ret = priv->cfg->ops->legacy->manage_ibss_station(priv, vif,
2588                                                         bss_conf->ibss_joined);
2589                 if (ret)
2590                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
2591                                 bss_conf->ibss_joined ? "add" : "remove",
2592                                 bss_conf->bssid);
2593         }
2594
2595         mutex_unlock(&priv->mutex);
2596
2597         IWL_DEBUG_MAC80211(priv, "leave\n");
2598 }
2599 EXPORT_SYMBOL(iwl_legacy_mac_bss_info_changed);
2600
2601 irqreturn_t iwl_legacy_isr(int irq, void *data)
2602 {
2603         struct iwl_priv *priv = data;
2604         u32 inta, inta_mask;
2605         u32 inta_fh;
2606         unsigned long flags;
2607         if (!priv)
2608                 return IRQ_NONE;
2609
2610         spin_lock_irqsave(&priv->lock, flags);
2611
2612         /* Disable (but don't clear!) interrupts here to avoid
2613          *    back-to-back ISRs and sporadic interrupts from our NIC.
2614          * If we have something to service, the tasklet will re-enable ints.
2615          * If we *don't* have something, we'll re-enable before leaving here. */
2616         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
2617         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
2618
2619         /* Discover which interrupts are active/pending */
2620         inta = iwl_read32(priv, CSR_INT);
2621         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2622
2623         /* Ignore interrupt if there's nothing in NIC to service.
2624          * This may be due to IRQ shared with another device,
2625          * or due to sporadic interrupts thrown from our NIC. */
2626         if (!inta && !inta_fh) {
2627                 IWL_DEBUG_ISR(priv,
2628                         "Ignore interrupt, inta == 0, inta_fh == 0\n");
2629                 goto none;
2630         }
2631
2632         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
2633                 /* Hardware disappeared. It might have already raised
2634                  * an interrupt */
2635                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
2636                 goto unplugged;
2637         }
2638
2639         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
2640                       inta, inta_mask, inta_fh);
2641
2642         inta &= ~CSR_INT_BIT_SCD;
2643
2644         /* iwl_irq_tasklet() will service interrupts and re-enable them */
2645         if (likely(inta || inta_fh))
2646                 tasklet_schedule(&priv->irq_tasklet);
2647
2648 unplugged:
2649         spin_unlock_irqrestore(&priv->lock, flags);
2650         return IRQ_HANDLED;
2651
2652 none:
2653         /* re-enable interrupts here since we don't have anything to service. */
2654         /* only Re-enable if disabled by irq */
2655         if (test_bit(STATUS_INT_ENABLED, &priv->status))
2656                 iwl_legacy_enable_interrupts(priv);
2657         spin_unlock_irqrestore(&priv->lock, flags);
2658         return IRQ_NONE;
2659 }
2660 EXPORT_SYMBOL(iwl_legacy_isr);
2661
2662 /*
2663  *  iwl_legacy_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
2664  *  function.
2665  */
2666 void iwl_legacy_tx_cmd_protection(struct iwl_priv *priv,
2667                                struct ieee80211_tx_info *info,
2668                                __le16 fc, __le32 *tx_flags)
2669 {
2670         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
2671                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
2672                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2673                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2674
2675                 if (!ieee80211_is_mgmt(fc))
2676                         return;
2677
2678                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2679                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2680                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2681                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2682                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2683                         *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2684                         *tx_flags |= TX_CMD_FLG_CTS_MSK;
2685                         break;
2686                 }
2687         } else if (info->control.rates[0].flags &
2688                    IEEE80211_TX_RC_USE_CTS_PROTECT) {
2689                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2690                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
2691                 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2692         }
2693 }
2694 EXPORT_SYMBOL(iwl_legacy_tx_cmd_protection);