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

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2010 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 <net/mac80211.h>
  34
  35 #include "iwl-eeprom.h"
  36 #include "iwl-dev.h" /* FIXME: remove */
  37 #include "iwl-debug.h"
  38 #include "iwl-core.h"
  39 #include "iwl-io.h"
  40 #include "iwl-power.h"
  41 #include "iwl-sta.h"
  42 #include "iwl-helpers.h"
  43
  44
  45 MODULE_DESCRIPTION("iwl core");
  46 MODULE_VERSION(IWLWIFI_VERSION);
  47 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  48 MODULE_LICENSE("GPL");
  49
  50 /*
  51  * set bt_coex_active to true, uCode will do kill/defer
  52  * every time the priority line is asserted (BT is sending signals on the
  53  * priority line in the PCIx).
  54  * set bt_coex_active to false, uCode will ignore the BT activity and
  55  * perform the normal operation
  56  *
  57  * User might experience transmit issue on some platform due to WiFi/BT
  58  * co-exist problem. The possible behaviors are:
  59  *   Able to scan and finding all the available AP
  60  *   Not able to associate with any AP
  61  * On those platforms, WiFi communication can be restored by set
  62  * "bt_coex_active" module parameter to "false"
  63  *
  64  * default: bt_coex_active = true (BT_COEX_ENABLE)
  65  */
  66 static bool bt_coex_active = true;
  67 module_param(bt_coex_active, bool, S_IRUGO);
  68 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
  69
  70 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
  71         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
  72                                     IWL_RATE_SISO_##s##M_PLCP, \
  73                                     IWL_RATE_MIMO2_##s##M_PLCP,\
  74                                     IWL_RATE_MIMO3_##s##M_PLCP,\
  75                                     IWL_RATE_##r##M_IEEE,      \
  76                                     IWL_RATE_##ip##M_INDEX,    \
  77                                     IWL_RATE_##in##M_INDEX,    \
  78                                     IWL_RATE_##rp##M_INDEX,    \
  79                                     IWL_RATE_##rn##M_INDEX,    \
  80                                     IWL_RATE_##pp##M_INDEX,    \
  81                                     IWL_RATE_##np##M_INDEX }
  82
  83 u32 iwl_debug_level;
  84 EXPORT_SYMBOL(iwl_debug_level);
  85
  86 /*
  87  * Parameter order:
  88  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
  89  *
  90  * If there isn't a valid next or previous rate then INV is used which
  91  * maps to IWL_RATE_INVALID
  92  *
  93  */
  94 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
  95         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  96         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  97         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  98         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
  99         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
 100         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
 101         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
 102         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
 103         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
 104         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
 105         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
 106         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
 107         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
 108         /* FIXME:RS:          ^^    should be INV (legacy) */
 109 };
 110 EXPORT_SYMBOL(iwl_rates);
 111
 112 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
 113 {
 114         int idx = 0;
 115
 116         /* HT rate format */
 117         if (rate_n_flags & RATE_MCS_HT_MSK) {
 118                 idx = (rate_n_flags & 0xff);
 119
 120                 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
 121                         idx = idx - IWL_RATE_MIMO3_6M_PLCP;
 122                 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 123                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 124
 125                 idx += IWL_FIRST_OFDM_RATE;
 126                 /* skip 9M not supported in ht*/
 127                 if (idx >= IWL_RATE_9M_INDEX)
 128                         idx += 1;
 129                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 130                         return idx;
 131
 132         /* legacy rate format, search for match in table */
 133         } else {
 134                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 135                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 136                                 return idx;
 137         }
 138
 139         return -1;
 140 }
 141 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
 142
 143 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
 144 {
 145         int i;
 146         u8 ind = ant;
 147         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
 148                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
 149                 if (priv->hw_params.valid_tx_ant & BIT(ind))
 150                         return ind;
 151         }
 152         return ant;
 153 }
 154 EXPORT_SYMBOL(iwl_toggle_tx_ant);
 155
 156 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 157 EXPORT_SYMBOL(iwl_bcast_addr);
 158
 159
 160 /* This function both allocates and initializes hw and priv. */
 161 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
 162                 struct ieee80211_ops *hw_ops)
 163 {
 164         struct iwl_priv *priv;
 165
 166         /* mac80211 allocates memory for this device instance, including
 167          *   space for this driver's private structure */
 168         struct ieee80211_hw *hw =
 169                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
 170         if (hw == NULL) {
 171                 printk(KERN_ERR "%s: Can not allocate network device\n",
 172                        cfg->name);
 173                 goto out;
 174         }
 175
 176         priv = hw->priv;
 177         priv->hw = hw;
 178
 179 out:
 180         return hw;
 181 }
 182 EXPORT_SYMBOL(iwl_alloc_all);
 183
 184 void iwl_hw_detect(struct iwl_priv *priv)
 185 {
 186         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
 187         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 188         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
 189 }
 190 EXPORT_SYMBOL(iwl_hw_detect);
 191
 192 /*
 193  * QoS  support
 194 */
 195 static void iwl_update_qos(struct iwl_priv *priv)
 196 {
 197         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 198                 return;
 199
 200         priv->qos_data.def_qos_parm.qos_flags = 0;
 201
 202         if (priv->qos_data.qos_active)
 203                 priv->qos_data.def_qos_parm.qos_flags |=
 204                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 205
 206         if (priv->current_ht_config.is_ht)
 207                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 208
 209         IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 210                       priv->qos_data.qos_active,
 211                       priv->qos_data.def_qos_parm.qos_flags);
 212
 213         iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
 214                                sizeof(struct iwl_qosparam_cmd),
 215                                &priv->qos_data.def_qos_parm, NULL);
 216 }
 217
 218 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 219 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 220 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 221                               struct ieee80211_sta_ht_cap *ht_info,
 222                               enum ieee80211_band band)
 223 {
 224         u16 max_bit_rate = 0;
 225         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 226         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 227
 228         ht_info->cap = 0;
 229         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 230
 231         ht_info->ht_supported = true;
 232
 233         if (priv->cfg->ht_greenfield_support)
 234                 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 235         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 236         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 237         if (priv->hw_params.ht40_channel & BIT(band)) {
 238                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 239                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 240                 ht_info->mcs.rx_mask[4] = 0x01;
 241                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 242         }
 243
 244         if (priv->cfg->mod_params->amsdu_size_8K)
 245                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 246
 247         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 248         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 249
 250         ht_info->mcs.rx_mask[0] = 0xFF;
 251         if (rx_chains_num >= 2)
 252                 ht_info->mcs.rx_mask[1] = 0xFF;
 253         if (rx_chains_num >= 3)
 254                 ht_info->mcs.rx_mask[2] = 0xFF;
 255
 256         /* Highest supported Rx data rate */
 257         max_bit_rate *= rx_chains_num;
 258         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 259         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 260
 261         /* Tx MCS capabilities */
 262         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 263         if (tx_chains_num != rx_chains_num) {
 264                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 265                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 266                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 267         }
 268 }
 269
 270 /**
 271  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 272  */
 273 int iwlcore_init_geos(struct iwl_priv *priv)
 274 {
 275         struct iwl_channel_info *ch;
 276         struct ieee80211_supported_band *sband;
 277         struct ieee80211_channel *channels;
 278         struct ieee80211_channel *geo_ch;
 279         struct ieee80211_rate *rates;
 280         int i = 0;
 281
 282         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 283             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 284                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 285                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 286                 return 0;
 287         }
 288
 289         channels = kzalloc(sizeof(struct ieee80211_channel) *
 290                            priv->channel_count, GFP_KERNEL);
 291         if (!channels)
 292                 return -ENOMEM;
 293
 294         rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
 295                         GFP_KERNEL);
 296         if (!rates) {
 297                 kfree(channels);
 298                 return -ENOMEM;
 299         }
 300
 301         /* 5.2GHz channels start after the 2.4GHz channels */
 302         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 303         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 304         /* just OFDM */
 305         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 306         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
 307
 308         if (priv->cfg->sku & IWL_SKU_N)
 309                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 310                                          IEEE80211_BAND_5GHZ);
 311
 312         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 313         sband->channels = channels;
 314         /* OFDM & CCK */
 315         sband->bitrates = rates;
 316         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
 317
 318         if (priv->cfg->sku & IWL_SKU_N)
 319                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 320                                          IEEE80211_BAND_2GHZ);
 321
 322         priv->ieee_channels = channels;
 323         priv->ieee_rates = rates;
 324
 325         for (i = 0;  i < priv->channel_count; i++) {
 326                 ch = &priv->channel_info[i];
 327
 328                 /* FIXME: might be removed if scan is OK */
 329                 if (!is_channel_valid(ch))
 330                         continue;
 331
 332                 if (is_channel_a_band(ch))
 333                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 334                 else
 335                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 336
 337                 geo_ch = &sband->channels[sband->n_channels++];
 338
 339                 geo_ch->center_freq =
 340                                 ieee80211_channel_to_frequency(ch->channel);
 341                 geo_ch->max_power = ch->max_power_avg;
 342                 geo_ch->max_antenna_gain = 0xff;
 343                 geo_ch->hw_value = ch->channel;
 344
 345                 if (is_channel_valid(ch)) {
 346                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 347                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 348
 349                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 350                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 351
 352                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 353                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 354
 355                         geo_ch->flags |= ch->ht40_extension_channel;
 356
 357                         if (ch->max_power_avg > priv->tx_power_device_lmt)
 358                                 priv->tx_power_device_lmt = ch->max_power_avg;
 359                 } else {
 360                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 361                 }
 362
 363                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 364                                 ch->channel, geo_ch->center_freq,
 365                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 366                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 367                                 "restricted" : "valid",
 368                                  geo_ch->flags);
 369         }
 370
 371         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 372              priv->cfg->sku & IWL_SKU_A) {
 373                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 374                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 375                            priv->pci_dev->device,
 376                            priv->pci_dev->subsystem_device);
 377                 priv->cfg->sku &= ~IWL_SKU_A;
 378         }
 379
 380         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 381                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 382                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 383
 384         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 385
 386         return 0;
 387 }
 388 EXPORT_SYMBOL(iwlcore_init_geos);
 389
 390 /*
 391  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 392  */
 393 void iwlcore_free_geos(struct iwl_priv *priv)
 394 {
 395         kfree(priv->ieee_channels);
 396         kfree(priv->ieee_rates);
 397         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 398 }
 399 EXPORT_SYMBOL(iwlcore_free_geos);
 400
 401 /*
 402  *  iwlcore_rts_tx_cmd_flag: Set rts/cts. 3945 and 4965 only share this
 403  *  function.
 404  */
 405 void iwlcore_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
 406                                 __le32 *tx_flags)
 407 {
 408         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 409                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
 410                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 411         } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 412                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 413                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
 414         }
 415 }
 416 EXPORT_SYMBOL(iwlcore_rts_tx_cmd_flag);
 417
 418 static bool is_single_rx_stream(struct iwl_priv *priv)
 419 {
 420         return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
 421                priv->current_ht_config.single_chain_sufficient;
 422 }
 423
 424 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 425                                    enum ieee80211_band band,
 426                                    u16 channel, u8 extension_chan_offset)
 427 {
 428         const struct iwl_channel_info *ch_info;
 429
 430         ch_info = iwl_get_channel_info(priv, band, channel);
 431         if (!is_channel_valid(ch_info))
 432                 return 0;
 433
 434         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 435                 return !(ch_info->ht40_extension_channel &
 436                                         IEEE80211_CHAN_NO_HT40PLUS);
 437         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 438                 return !(ch_info->ht40_extension_channel &
 439                                         IEEE80211_CHAN_NO_HT40MINUS);
 440
 441         return 0;
 442 }
 443
 444 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 445                          struct ieee80211_sta_ht_cap *sta_ht_inf)
 446 {
 447         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 448
 449         if (!ht_conf->is_ht || !ht_conf->is_40mhz)
 450                 return 0;
 451
 452         /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
 453          * the bit will not set if it is pure 40MHz case
 454          */
 455         if (sta_ht_inf) {
 456                 if (!sta_ht_inf->ht_supported)
 457                         return 0;
 458         }
 459 #ifdef CONFIG_IWLWIFI_DEBUG
 460         if (priv->disable_ht40)
 461                 return 0;
 462 #endif
 463         return iwl_is_channel_extension(priv, priv->band,
 464                         le16_to_cpu(priv->staging_rxon.channel),
 465                         ht_conf->extension_chan_offset);
 466 }
 467 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
 468
 469 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 470 {
 471         u16 new_val = 0;
 472         u16 beacon_factor = 0;
 473
 474         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 475         new_val = beacon_val / beacon_factor;
 476
 477         if (!new_val)
 478                 new_val = max_beacon_val;
 479
 480         return new_val;
 481 }
 482
 483 void iwl_setup_rxon_timing(struct iwl_priv *priv)
 484 {
 485         u64 tsf;
 486         s32 interval_tm, rem;
 487         unsigned long flags;
 488         struct ieee80211_conf *conf = NULL;
 489         u16 beacon_int;
 490
 491         conf = ieee80211_get_hw_conf(priv->hw);
 492
 493         spin_lock_irqsave(&priv->lock, flags);
 494         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 495         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 496
 497         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 498                 beacon_int = priv->beacon_int;
 499                 priv->rxon_timing.atim_window = 0;
 500         } else {
 501                 beacon_int = priv->vif->bss_conf.beacon_int;
 502
 503                 /* TODO: we need to get atim_window from upper stack
 504                  * for now we set to 0 */
 505                 priv->rxon_timing.atim_window = 0;
 506         }
 507
 508         beacon_int = iwl_adjust_beacon_interval(beacon_int,
 509                                 priv->hw_params.max_beacon_itrvl * 1024);
 510         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 511
 512         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 513         interval_tm = beacon_int * 1024;
 514         rem = do_div(tsf, interval_tm);
 515         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 516
 517         spin_unlock_irqrestore(&priv->lock, flags);
 518         IWL_DEBUG_ASSOC(priv,
 519                         "beacon interval %d beacon timer %d beacon tim %d\n",
 520                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 521                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 522                         le16_to_cpu(priv->rxon_timing.atim_window));
 523 }
 524 EXPORT_SYMBOL(iwl_setup_rxon_timing);
 525
 526 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 527 {
 528         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 529
 530         if (hw_decrypt)
 531                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 532         else
 533                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 534
 535 }
 536 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
 537
 538 /**
 539  * iwl_check_rxon_cmd - validate RXON structure is valid
 540  *
 541  * NOTE:  This is really only useful during development and can eventually
 542  * be #ifdef'd out once the driver is stable and folks aren't actively
 543  * making changes
 544  */
 545 int iwl_check_rxon_cmd(struct iwl_priv *priv)
 546 {
 547         int error = 0;
 548         int counter = 1;
 549         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 550
 551         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 552                 error |= le32_to_cpu(rxon->flags &
 553                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 554                                  RXON_FLG_RADAR_DETECT_MSK));
 555                 if (error)
 556                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 557                                     counter++, error);
 558         } else {
 559                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 560                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 561                 if (error)
 562                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 563                                     counter++, error);
 564                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 565                 if (error)
 566                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 567                                     counter++, error);
 568         }
 569         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 570         if (error)
 571                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 572
 573         /* make sure basic rates 6Mbps and 1Mbps are supported */
 574         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 575                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 576         if (error)
 577                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 578
 579         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 580         if (error)
 581                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 582
 583         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 584                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 585         if (error)
 586                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 587                             counter++, error);
 588
 589         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 590                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 591         if (error)
 592                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 593                             counter++, error);
 594
 595         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 596                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 597         if (error)
 598                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 599                             counter++, error);
 600
 601         if (error)
 602                 IWL_WARN(priv, "Tuning to channel %d\n",
 603                             le16_to_cpu(rxon->channel));
 604
 605         if (error) {
 606                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
 607                 return -1;
 608         }
 609         return 0;
 610 }
 611 EXPORT_SYMBOL(iwl_check_rxon_cmd);
 612
 613 /**
 614  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 615  * @priv: staging_rxon is compared to active_rxon
 616  *
 617  * If the RXON structure is changing enough to require a new tune,
 618  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 619  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 620  */
 621 int iwl_full_rxon_required(struct iwl_priv *priv)
 622 {
 623
 624         /* These items are only settable from the full RXON command */
 625         if (!(iwl_is_associated(priv)) ||
 626             compare_ether_addr(priv->staging_rxon.bssid_addr,
 627                                priv->active_rxon.bssid_addr) ||
 628             compare_ether_addr(priv->staging_rxon.node_addr,
 629                                priv->active_rxon.node_addr) ||
 630             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 631                                priv->active_rxon.wlap_bssid_addr) ||
 632             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 633             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 634             (priv->staging_rxon.air_propagation !=
 635              priv->active_rxon.air_propagation) ||
 636             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 637              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 638             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 639              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 640             (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
 641              priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
 642             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 643                 return 1;
 644
 645         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 646          * be updated with the RXON_ASSOC command -- however only some
 647          * flag transitions are allowed using RXON_ASSOC */
 648
 649         /* Check if we are not switching bands */
 650         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 651             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 652                 return 1;
 653
 654         /* Check if we are switching association toggle */
 655         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 656                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 657                 return 1;
 658
 659         return 0;
 660 }
 661 EXPORT_SYMBOL(iwl_full_rxon_required);
 662
 663 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
 664 {
 665         /*
 666          * Assign the lowest rate -- should really get this from
 667          * the beacon skb from mac80211.
 668          */
 669         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 670                 return IWL_RATE_1M_PLCP;
 671         else
 672                 return IWL_RATE_6M_PLCP;
 673 }
 674 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
 675
 676 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 677 {
 678         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 679
 680         if (!ht_conf->is_ht) {
 681                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 682                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 683                         RXON_FLG_HT40_PROT_MSK |
 684                         RXON_FLG_HT_PROT_MSK);
 685                 return;
 686         }
 687
 688         /* FIXME: if the definition of ht_protection changed, the "translation"
 689          * will be needed for rxon->flags
 690          */
 691         rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
 692
 693         /* Set up channel bandwidth:
 694          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 695         /* clear the HT channel mode before set the mode */
 696         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 697                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 698         if (iwl_is_ht40_tx_allowed(priv, NULL)) {
 699                 /* pure ht40 */
 700                 if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 701                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 702                         /* Note: control channel is opposite of extension channel */
 703                         switch (ht_conf->extension_chan_offset) {
 704                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 705                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 706                                 break;
 707                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 708                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 709                                 break;
 710                         }
 711                 } else {
 712                         /* Note: control channel is opposite of extension channel */
 713                         switch (ht_conf->extension_chan_offset) {
 714                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 715                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 716                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 717                                 break;
 718                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 719                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 720                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 721                                 break;
 722                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 723                         default:
 724                                 /* channel location only valid if in Mixed mode */
 725                                 IWL_ERR(priv, "invalid extension channel offset\n");
 726                                 break;
 727                         }
 728                 }
 729         } else {
 730                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 731         }
 732
 733         if (priv->cfg->ops->hcmd->set_rxon_chain)
 734                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 735
 736         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 737                         "extension channel offset 0x%x\n",
 738                         le32_to_cpu(rxon->flags), ht_conf->ht_protection,
 739                         ht_conf->extension_chan_offset);
 740         return;
 741 }
 742 EXPORT_SYMBOL(iwl_set_rxon_ht);
 743
 744 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 745 #define IWL_NUM_RX_CHAINS_SINGLE        2
 746 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 747 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 748
 749 /*
 750  * Determine how many receiver/antenna chains to use.
 751  *
 752  * More provides better reception via diversity.  Fewer saves power
 753  * at the expense of throughput, but only when not in powersave to
 754  * start with.
 755  *
 756  * MIMO (dual stream) requires at least 2, but works better with 3.
 757  * This does not determine *which* chains to use, just how many.
 758  */
 759 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 760 {
 761         /* # of Rx chains to use when expecting MIMO. */
 762         if (is_single_rx_stream(priv))
 763                 return IWL_NUM_RX_CHAINS_SINGLE;
 764         else
 765                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 766 }
 767
 768 /*
 769  * When we are in power saving mode, unless device support spatial
 770  * multiplexing power save, use the active count for rx chain count.
 771  */
 772 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 773 {
 774         /* # Rx chains when idling, depending on SMPS mode */
 775         switch (priv->current_ht_config.smps) {
 776         case IEEE80211_SMPS_STATIC:
 777         case IEEE80211_SMPS_DYNAMIC:
 778                 return IWL_NUM_IDLE_CHAINS_SINGLE;
 779         case IEEE80211_SMPS_OFF:
 780                 return active_cnt;
 781         default:
 782                 WARN(1, "invalid SMPS mode %d",
 783                      priv->current_ht_config.smps);
 784                 return active_cnt;
 785         }
 786 }
 787
 788 /* up to 4 chains */
 789 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 790 {
 791         u8 res;
 792         res = (chain_bitmap & BIT(0)) >> 0;
 793         res += (chain_bitmap & BIT(1)) >> 1;
 794         res += (chain_bitmap & BIT(2)) >> 2;
 795         res += (chain_bitmap & BIT(3)) >> 3;
 796         return res;
 797 }
 798
 799 /**
 800  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 801  *
 802  * Selects how many and which Rx receivers/antennas/chains to use.
 803  * This should not be used for scan command ... it puts data in wrong place.
 804  */
 805 void iwl_set_rxon_chain(struct iwl_priv *priv)
 806 {
 807         bool is_single = is_single_rx_stream(priv);
 808         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 809         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
 810         u32 active_chains;
 811         u16 rx_chain;
 812
 813         /* Tell uCode which antennas are actually connected.
 814          * Before first association, we assume all antennas are connected.
 815          * Just after first association, iwl_chain_noise_calibration()
 816          *    checks which antennas actually *are* connected. */
 817          if (priv->chain_noise_data.active_chains)
 818                 active_chains = priv->chain_noise_data.active_chains;
 819         else
 820                 active_chains = priv->hw_params.valid_rx_ant;
 821
 822         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
 823
 824         /* How many receivers should we use? */
 825         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
 826         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
 827
 828
 829         /* correct rx chain count according hw settings
 830          * and chain noise calibration
 831          */
 832         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
 833         if (valid_rx_cnt < active_rx_cnt)
 834                 active_rx_cnt = valid_rx_cnt;
 835
 836         if (valid_rx_cnt < idle_rx_cnt)
 837                 idle_rx_cnt = valid_rx_cnt;
 838
 839         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
 840         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
 841
 842         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
 843
 844         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
 845                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
 846         else
 847                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
 848
 849         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
 850                         priv->staging_rxon.rx_chain,
 851                         active_rx_cnt, idle_rx_cnt);
 852
 853         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
 854                 active_rx_cnt < idle_rx_cnt);
 855 }
 856 EXPORT_SYMBOL(iwl_set_rxon_chain);
 857
 858 /**
 859  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 860  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 861  * @channel: Any channel valid for the requested phymode
 862
 863  * In addition to setting the staging RXON, priv->phymode is also set.
 864  *
 865  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 866  * in the staging RXON flag structure based on the phymode
 867  */
 868 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
 869 {
 870         enum ieee80211_band band = ch->band;
 871         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
 872
 873         if (!iwl_get_channel_info(priv, band, channel)) {
 874                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
 875                                channel, band);
 876                 return -EINVAL;
 877         }
 878
 879         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 880             (priv->band == band))
 881                 return 0;
 882
 883         priv->staging_rxon.channel = cpu_to_le16(channel);
 884         if (band == IEEE80211_BAND_5GHZ)
 885                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 886         else
 887                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 888
 889         priv->band = band;
 890
 891         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 892
 893         return 0;
 894 }
 895 EXPORT_SYMBOL(iwl_set_rxon_channel);
 896
 897 void iwl_set_flags_for_band(struct iwl_priv *priv,
 898                             enum ieee80211_band band)
 899 {
 900         if (band == IEEE80211_BAND_5GHZ) {
 901                 priv->staging_rxon.flags &=
 902                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 903                       | RXON_FLG_CCK_MSK);
 904                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 905         } else {
 906                 /* Copied from iwl_post_associate() */
 907                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
 908                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 909                 else
 910                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 911
 912                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
 913                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 914
 915                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 916                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
 917                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
 918         }
 919 }
 920
 921 /*
 922  * initialize rxon structure with default values from eeprom
 923  */
 924 void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
 925 {
 926         const struct iwl_channel_info *ch_info;
 927
 928         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
 929
 930         switch (mode) {
 931         case NL80211_IFTYPE_AP:
 932                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
 933                 break;
 934
 935         case NL80211_IFTYPE_STATION:
 936                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
 937                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
 938                 break;
 939
 940         case NL80211_IFTYPE_ADHOC:
 941                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
 942                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
 943                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
 944                                                   RXON_FILTER_ACCEPT_GRP_MSK;
 945                 break;
 946
 947         default:
 948                 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
 949                 break;
 950         }
 951
 952 #if 0
 953         /* TODO:  Figure out when short_preamble would be set and cache from
 954          * that */
 955         if (!hw_to_local(priv->hw)->short_preamble)
 956                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
 957         else
 958                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
 959 #endif
 960
 961         ch_info = iwl_get_channel_info(priv, priv->band,
 962                                        le16_to_cpu(priv->active_rxon.channel));
 963
 964         if (!ch_info)
 965                 ch_info = &priv->channel_info[0];
 966
 967         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
 968         priv->band = ch_info->band;
 969
 970         iwl_set_flags_for_band(priv, priv->band);
 971
 972         priv->staging_rxon.ofdm_basic_rates =
 973             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
 974         priv->staging_rxon.cck_basic_rates =
 975             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
 976
 977         /* clear both MIX and PURE40 mode flag */
 978         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
 979                                         RXON_FLG_CHANNEL_MODE_PURE_40);
 980         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
 981         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
 982         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
 983         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
 984         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
 985 }
 986 EXPORT_SYMBOL(iwl_connection_init_rx_config);
 987
 988 static void iwl_set_rate(struct iwl_priv *priv)
 989 {
 990         const struct ieee80211_supported_band *hw = NULL;
 991         struct ieee80211_rate *rate;
 992         int i;
 993
 994         hw = iwl_get_hw_mode(priv, priv->band);
 995         if (!hw) {
 996                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
 997                 return;
 998         }
 999
1000         priv->active_rate = 0;
1001
1002         for (i = 0; i < hw->n_bitrates; i++) {
1003                 rate = &(hw->bitrates[i]);
1004                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1005                         priv->active_rate |= (1 << rate->hw_value);
1006         }
1007
1008         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
1009
1010         priv->staging_rxon.cck_basic_rates =
1011             (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1012
1013         priv->staging_rxon.ofdm_basic_rates =
1014            (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1015 }
1016
1017 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1018 {
1019         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1020         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1021         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1022
1023         if (priv->switch_rxon.switch_in_progress) {
1024                 if (!le32_to_cpu(csa->status) &&
1025                     (csa->channel == priv->switch_rxon.channel)) {
1026                         rxon->channel = csa->channel;
1027                         priv->staging_rxon.channel = csa->channel;
1028                         IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
1029                               le16_to_cpu(csa->channel));
1030                 } else
1031                         IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
1032                               le16_to_cpu(csa->channel));
1033
1034                 priv->switch_rxon.switch_in_progress = false;
1035         }
1036 }
1037 EXPORT_SYMBOL(iwl_rx_csa);
1038
1039 #ifdef CONFIG_IWLWIFI_DEBUG
1040 void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1041 {
1042         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1043
1044         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1045         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1046         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1047         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1048         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1049                         le32_to_cpu(rxon->filter_flags));
1050         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1051         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1052                         rxon->ofdm_basic_rates);
1053         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1054         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1055         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1056         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1057 }
1058 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1059 #endif
1060 /**
1061  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1062  */
1063 void iwl_irq_handle_error(struct iwl_priv *priv)
1064 {
1065         /* Set the FW error flag -- cleared on iwl_down */
1066         set_bit(STATUS_FW_ERROR, &priv->status);
1067
1068         /* Cancel currently queued command. */
1069         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1070
1071         IWL_ERR(priv, "Loaded firmware version: %s\n",
1072                 priv->hw->wiphy->fw_version);
1073
1074         priv->cfg->ops->lib->dump_nic_error_log(priv);
1075         if (priv->cfg->ops->lib->dump_csr)
1076                 priv->cfg->ops->lib->dump_csr(priv);
1077         if (priv->cfg->ops->lib->dump_fh)
1078                 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1079         priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1080 #ifdef CONFIG_IWLWIFI_DEBUG
1081         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1082                 iwl_print_rx_config_cmd(priv);
1083 #endif
1084
1085         wake_up_interruptible(&priv->wait_command_queue);
1086
1087         /* Keep the restart process from trying to send host
1088          * commands by clearing the INIT status bit */
1089         clear_bit(STATUS_READY, &priv->status);
1090
1091         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1092                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1093                           "Restarting adapter due to uCode error.\n");
1094
1095                 if (priv->cfg->mod_params->restart_fw)
1096                         queue_work(priv->workqueue, &priv->restart);
1097         }
1098 }
1099 EXPORT_SYMBOL(iwl_irq_handle_error);
1100
1101 static int iwl_apm_stop_master(struct iwl_priv *priv)
1102 {
1103         int ret = 0;
1104
1105         /* stop device's busmaster DMA activity */
1106         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1107
1108         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1109                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1110         if (ret)
1111                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1112
1113         IWL_DEBUG_INFO(priv, "stop master\n");
1114
1115         return ret;
1116 }
1117
1118 void iwl_apm_stop(struct iwl_priv *priv)
1119 {
1120         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1121
1122         /* Stop device's DMA activity */
1123         iwl_apm_stop_master(priv);
1124
1125         /* Reset the entire device */
1126         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1127
1128         udelay(10);
1129
1130         /*
1131          * Clear "initialization complete" bit to move adapter from
1132          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1133          */
1134         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1135 }
1136 EXPORT_SYMBOL(iwl_apm_stop);
1137
1138
1139 /*
1140  * Start up NIC's basic functionality after it has been reset
1141  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1142  * NOTE:  This does not load uCode nor start the embedded processor
1143  */
1144 int iwl_apm_init(struct iwl_priv *priv)
1145 {
1146         int ret = 0;
1147         u16 lctl;
1148
1149         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1150
1151         /*
1152          * Use "set_bit" below rather than "write", to preserve any hardware
1153          * bits already set by default after reset.
1154          */
1155
1156         /* Disable L0S exit timer (platform NMI Work/Around) */
1157         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1158                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1159
1160         /*
1161          * Disable L0s without affecting L1;
1162          *  don't wait for ICH L0s (ICH bug W/A)
1163          */
1164         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1165                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1166
1167         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1168         iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1169
1170         /*
1171          * Enable HAP INTA (interrupt from management bus) to
1172          * wake device's PCI Express link L1a -> L0s
1173          * NOTE:  This is no-op for 3945 (non-existant bit)
1174          */
1175         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1176                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1177
1178         /*
1179          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1180          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1181          * If so (likely), disable L0S, so device moves directly L0->L1;
1182          *    costs negligible amount of power savings.
1183          * If not (unlikely), enable L0S, so there is at least some
1184          *    power savings, even without L1.
1185          */
1186         if (priv->cfg->set_l0s) {
1187                 lctl = iwl_pcie_link_ctl(priv);
1188                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1189                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1190                         /* L1-ASPM enabled; disable(!) L0S  */
1191                         iwl_set_bit(priv, CSR_GIO_REG,
1192                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1193                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1194                 } else {
1195                         /* L1-ASPM disabled; enable(!) L0S */
1196                         iwl_clear_bit(priv, CSR_GIO_REG,
1197                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1198                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1199                 }
1200         }
1201
1202         /* Configure analog phase-lock-loop before activating to D0A */
1203         if (priv->cfg->pll_cfg_val)
1204                 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);
1205
1206         /*
1207          * Set "initialization complete" bit to move adapter from
1208          * D0U* --> D0A* (powered-up active) state.
1209          */
1210         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1211
1212         /*
1213          * Wait for clock stabilization; once stabilized, access to
1214          * device-internal resources is supported, e.g. iwl_write_prph()
1215          * and accesses to uCode SRAM.
1216          */
1217         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1218                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1219                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1220         if (ret < 0) {
1221                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1222                 goto out;
1223         }
1224
1225         /*
1226          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1227          * BSM (Boostrap State Machine) is only in 3945 and 4965;
1228          * later devices (i.e. 5000 and later) have non-volatile SRAM,
1229          * and don't need BSM to restore data after power-saving sleep.
1230          *
1231          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1232          * do not disable clocks.  This preserves any hardware bits already
1233          * set by default in "CLK_CTRL_REG" after reset.
1234          */
1235         if (priv->cfg->use_bsm)
1236                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1237                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1238         else
1239                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1240                         APMG_CLK_VAL_DMA_CLK_RQT);
1241         udelay(20);
1242
1243         /* Disable L1-Active */
1244         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1245                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1246
1247 out:
1248         return ret;
1249 }
1250 EXPORT_SYMBOL(iwl_apm_init);
1251
1252
1253
1254 void iwl_configure_filter(struct ieee80211_hw *hw,
1255                           unsigned int changed_flags,
1256                           unsigned int *total_flags,
1257                           u64 multicast)
1258 {
1259         struct iwl_priv *priv = hw->priv;
1260         __le32 filter_or = 0, filter_nand = 0;
1261
1262 #define CHK(test, flag) do { \
1263         if (*total_flags & (test))              \
1264                 filter_or |= (flag);            \
1265         else                                    \
1266                 filter_nand |= (flag);          \
1267         } while (0)
1268
1269         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1270                         changed_flags, *total_flags);
1271
1272         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
1273         CHK(FIF_ALLMULTI, RXON_FILTER_ACCEPT_GRP_MSK);
1274         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK);
1275         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1276
1277 #undef CHK
1278
1279         mutex_lock(&priv->mutex);
1280
1281         priv->staging_rxon.filter_flags &= ~filter_nand;
1282         priv->staging_rxon.filter_flags |= filter_or;
1283
1284         iwlcore_commit_rxon(priv);
1285
1286         mutex_unlock(&priv->mutex);
1287
1288         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1289                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1290 }
1291 EXPORT_SYMBOL(iwl_configure_filter);
1292
1293 int iwl_set_hw_params(struct iwl_priv *priv)
1294 {
1295         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1296         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1297         if (priv->cfg->mod_params->amsdu_size_8K)
1298                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
1299         else
1300                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
1301
1302         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1303
1304         if (priv->cfg->mod_params->disable_11n)
1305                 priv->cfg->sku &= ~IWL_SKU_N;
1306
1307         /* Device-specific setup */
1308         return priv->cfg->ops->lib->set_hw_params(priv);
1309 }
1310 EXPORT_SYMBOL(iwl_set_hw_params);
1311
1312 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1313 {
1314         int ret = 0;
1315         s8 prev_tx_power = priv->tx_power_user_lmt;
1316
1317         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1318                 IWL_WARN(priv,
1319                          "Requested user TXPOWER %d below lower limit %d.\n",
1320                          tx_power,
1321                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
1322                 return -EINVAL;
1323         }
1324
1325         if (tx_power > priv->tx_power_device_lmt) {
1326                 IWL_WARN(priv,
1327                         "Requested user TXPOWER %d above upper limit %d.\n",
1328                          tx_power, priv->tx_power_device_lmt);
1329                 return -EINVAL;
1330         }
1331
1332         if (priv->tx_power_user_lmt != tx_power)
1333                 force = true;
1334
1335         /* if nic is not up don't send command */
1336         if (iwl_is_ready_rf(priv)) {
1337                 priv->tx_power_user_lmt = tx_power;
1338                 if (force && priv->cfg->ops->lib->send_tx_power)
1339                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1340                 else if (!priv->cfg->ops->lib->send_tx_power)
1341                         ret = -EOPNOTSUPP;
1342                 /*
1343                  * if fail to set tx_power, restore the orig. tx power
1344                  */
1345                 if (ret)
1346                         priv->tx_power_user_lmt = prev_tx_power;
1347         }
1348
1349         /*
1350          * Even this is an async host command, the command
1351          * will always report success from uCode
1352          * So once driver can placing the command into the queue
1353          * successfully, driver can use priv->tx_power_user_lmt
1354          * to reflect the current tx power
1355          */
1356         return ret;
1357 }
1358 EXPORT_SYMBOL(iwl_set_tx_power);
1359
1360 irqreturn_t iwl_isr_legacy(int irq, void *data)
1361 {
1362         struct iwl_priv *priv = data;
1363         u32 inta, inta_mask;
1364         u32 inta_fh;
1365         unsigned long flags;
1366         if (!priv)
1367                 return IRQ_NONE;
1368
1369         spin_lock_irqsave(&priv->lock, flags);
1370
1371         /* Disable (but don't clear!) interrupts here to avoid
1372          *    back-to-back ISRs and sporadic interrupts from our NIC.
1373          * If we have something to service, the tasklet will re-enable ints.
1374          * If we *don't* have something, we'll re-enable before leaving here. */
1375         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1376         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1377
1378         /* Discover which interrupts are active/pending */
1379         inta = iwl_read32(priv, CSR_INT);
1380         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1381
1382         /* Ignore interrupt if there's nothing in NIC to service.
1383          * This may be due to IRQ shared with another device,
1384          * or due to sporadic interrupts thrown from our NIC. */
1385         if (!inta && !inta_fh) {
1386                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1387                 goto none;
1388         }
1389
1390         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1391                 /* Hardware disappeared. It might have already raised
1392                  * an interrupt */
1393                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1394                 goto unplugged;
1395         }
1396
1397         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1398                       inta, inta_mask, inta_fh);
1399
1400         inta &= ~CSR_INT_BIT_SCD;
1401
1402         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1403         if (likely(inta || inta_fh))
1404                 tasklet_schedule(&priv->irq_tasklet);
1405
1406  unplugged:
1407         spin_unlock_irqrestore(&priv->lock, flags);
1408         return IRQ_HANDLED;
1409
1410  none:
1411         /* re-enable interrupts here since we don't have anything to service. */
1412         /* only Re-enable if diabled by irq */
1413         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1414                 iwl_enable_interrupts(priv);
1415         spin_unlock_irqrestore(&priv->lock, flags);
1416         return IRQ_NONE;
1417 }
1418 EXPORT_SYMBOL(iwl_isr_legacy);
1419
1420 void iwl_send_bt_config(struct iwl_priv *priv)
1421 {
1422         struct iwl_bt_cmd bt_cmd = {
1423                 .lead_time = BT_LEAD_TIME_DEF,
1424                 .max_kill = BT_MAX_KILL_DEF,
1425                 .kill_ack_mask = 0,
1426                 .kill_cts_mask = 0,
1427         };
1428
1429         if (!bt_coex_active)
1430                 bt_cmd.flags = BT_COEX_DISABLE;
1431         else
1432                 bt_cmd.flags = BT_COEX_ENABLE;
1433
1434         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1435                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1436
1437         if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1438                              sizeof(struct iwl_bt_cmd), &bt_cmd))
1439                 IWL_ERR(priv, "failed to send BT Coex Config\n");
1440 }
1441 EXPORT_SYMBOL(iwl_send_bt_config);
1442
1443 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1444 {
1445         struct iwl_statistics_cmd statistics_cmd = {
1446                 .configuration_flags =
1447                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1448         };
1449
1450         if (flags & CMD_ASYNC)
1451                 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1452                                                sizeof(struct iwl_statistics_cmd),
1453                                                &statistics_cmd, NULL);
1454         else
1455                 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1456                                         sizeof(struct iwl_statistics_cmd),
1457                                         &statistics_cmd);
1458 }
1459 EXPORT_SYMBOL(iwl_send_statistics_request);
1460
1461 /**
1462  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1463  *   using sample data 100 bytes apart.  If these sample points are good,
1464  *   it's a pretty good bet that everything between them is good, too.
1465  */
1466 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1467 {
1468         u32 val;
1469         int ret = 0;
1470         u32 errcnt = 0;
1471         u32 i;
1472
1473         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1474
1475         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1476                 /* read data comes through single port, auto-incr addr */
1477                 /* NOTE: Use the debugless read so we don't flood kernel log
1478                  * if IWL_DL_IO is set */
1479                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1480                         i + IWL49_RTC_INST_LOWER_BOUND);
1481                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1482                 if (val != le32_to_cpu(*image)) {
1483                         ret = -EIO;
1484                         errcnt++;
1485                         if (errcnt >= 3)
1486                                 break;
1487                 }
1488         }
1489
1490         return ret;
1491 }
1492
1493 /**
1494  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1495  *     looking at all data.
1496  */
1497 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1498                                  u32 len)
1499 {
1500         u32 val;
1501         u32 save_len = len;
1502         int ret = 0;
1503         u32 errcnt;
1504
1505         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1506
1507         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1508                            IWL49_RTC_INST_LOWER_BOUND);
1509
1510         errcnt = 0;
1511         for (; len > 0; len -= sizeof(u32), image++) {
1512                 /* read data comes through single port, auto-incr addr */
1513                 /* NOTE: Use the debugless read so we don't flood kernel log
1514                  * if IWL_DL_IO is set */
1515                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1516                 if (val != le32_to_cpu(*image)) {
1517                         IWL_ERR(priv, "uCode INST section is invalid at "
1518                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1519                                   save_len - len, val, le32_to_cpu(*image));
1520                         ret = -EIO;
1521                         errcnt++;
1522                         if (errcnt >= 20)
1523                                 break;
1524                 }
1525         }
1526
1527         if (!errcnt)
1528                 IWL_DEBUG_INFO(priv,
1529                     "ucode image in INSTRUCTION memory is good\n");
1530
1531         return ret;
1532 }
1533
1534 /**
1535  * iwl_verify_ucode - determine which instruction image is in SRAM,
1536  *    and verify its contents
1537  */
1538 int iwl_verify_ucode(struct iwl_priv *priv)
1539 {
1540         __le32 *image;
1541         u32 len;
1542         int ret;
1543
1544         /* Try bootstrap */
1545         image = (__le32 *)priv->ucode_boot.v_addr;
1546         len = priv->ucode_boot.len;
1547         ret = iwlcore_verify_inst_sparse(priv, image, len);
1548         if (!ret) {
1549                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
1550                 return 0;
1551         }
1552
1553         /* Try initialize */
1554         image = (__le32 *)priv->ucode_init.v_addr;
1555         len = priv->ucode_init.len;
1556         ret = iwlcore_verify_inst_sparse(priv, image, len);
1557         if (!ret) {
1558                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
1559                 return 0;
1560         }
1561
1562         /* Try runtime/protocol */
1563         image = (__le32 *)priv->ucode_code.v_addr;
1564         len = priv->ucode_code.len;
1565         ret = iwlcore_verify_inst_sparse(priv, image, len);
1566         if (!ret) {
1567                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
1568                 return 0;
1569         }
1570
1571         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1572
1573         /* Since nothing seems to match, show first several data entries in
1574          * instruction SRAM, so maybe visual inspection will give a clue.
1575          * Selection of bootstrap image (vs. other images) is arbitrary. */
1576         image = (__le32 *)priv->ucode_boot.v_addr;
1577         len = priv->ucode_boot.len;
1578         ret = iwl_verify_inst_full(priv, image, len);
1579
1580         return ret;
1581 }
1582 EXPORT_SYMBOL(iwl_verify_ucode);
1583
1584
1585 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1586 {
1587         struct iwl_ct_kill_config cmd;
1588         struct iwl_ct_kill_throttling_config adv_cmd;
1589         unsigned long flags;
1590         int ret = 0;
1591
1592         spin_lock_irqsave(&priv->lock, flags);
1593         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1594                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1595         spin_unlock_irqrestore(&priv->lock, flags);
1596         priv->thermal_throttle.ct_kill_toggle = false;
1597
1598         if (priv->cfg->support_ct_kill_exit) {
1599                 adv_cmd.critical_temperature_enter =
1600                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1601                 adv_cmd.critical_temperature_exit =
1602                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1603
1604                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1605                                        sizeof(adv_cmd), &adv_cmd);
1606                 if (ret)
1607                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1608                 else
1609                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1610                                         "succeeded, "
1611                                         "critical temperature enter is %d,"
1612                                         "exit is %d\n",
1613                                        priv->hw_params.ct_kill_threshold,
1614                                        priv->hw_params.ct_kill_exit_threshold);
1615         } else {
1616                 cmd.critical_temperature_R =
1617                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1618
1619                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1620                                        sizeof(cmd), &cmd);
1621                 if (ret)
1622                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1623                 else
1624                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1625                                         "succeeded, "
1626                                         "critical temperature is %d\n",
1627                                         priv->hw_params.ct_kill_threshold);
1628         }
1629 }
1630 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1631
1632
1633 /*
1634  * CARD_STATE_CMD
1635  *
1636  * Use: Sets the device's internal card state to enable, disable, or halt
1637  *
1638  * When in the 'enable' state the card operates as normal.
1639  * When in the 'disable' state, the card enters into a low power mode.
1640  * When in the 'halt' state, the card is shut down and must be fully
1641  * restarted to come back on.
1642  */
1643 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1644 {
1645         struct iwl_host_cmd cmd = {
1646                 .id = REPLY_CARD_STATE_CMD,
1647                 .len = sizeof(u32),
1648                 .data = &flags,
1649                 .flags = meta_flag,
1650         };
1651
1652         return iwl_send_cmd(priv, &cmd);
1653 }
1654
1655 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1656                            struct iwl_rx_mem_buffer *rxb)
1657 {
1658 #ifdef CONFIG_IWLWIFI_DEBUG
1659         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1660         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1661         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1662                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1663 #endif
1664 }
1665 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1666
1667 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1668                                       struct iwl_rx_mem_buffer *rxb)
1669 {
1670         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1671         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1672         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1673                         "notification for %s:\n", len,
1674                         get_cmd_string(pkt->hdr.cmd));
1675         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1676 }
1677 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1678
1679 void iwl_rx_reply_error(struct iwl_priv *priv,
1680                         struct iwl_rx_mem_buffer *rxb)
1681 {
1682         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1683
1684         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1685                 "seq 0x%04X ser 0x%08X\n",
1686                 le32_to_cpu(pkt->u.err_resp.error_type),
1687                 get_cmd_string(pkt->u.err_resp.cmd_id),
1688                 pkt->u.err_resp.cmd_id,
1689                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1690                 le32_to_cpu(pkt->u.err_resp.error_info));
1691 }
1692 EXPORT_SYMBOL(iwl_rx_reply_error);
1693
1694 void iwl_clear_isr_stats(struct iwl_priv *priv)
1695 {
1696         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1697 }
1698
1699 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1700                            const struct ieee80211_tx_queue_params *params)
1701 {
1702         struct iwl_priv *priv = hw->priv;
1703         unsigned long flags;
1704         int q;
1705
1706         IWL_DEBUG_MAC80211(priv, "enter\n");
1707
1708         if (!iwl_is_ready_rf(priv)) {
1709                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1710                 return -EIO;
1711         }
1712
1713         if (queue >= AC_NUM) {
1714                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1715                 return 0;
1716         }
1717
1718         q = AC_NUM - 1 - queue;
1719
1720         spin_lock_irqsave(&priv->lock, flags);
1721
1722         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
1723         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
1724         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1725         priv->qos_data.def_qos_parm.ac[q].edca_txop =
1726                         cpu_to_le16((params->txop * 32));
1727
1728         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1729
1730         spin_unlock_irqrestore(&priv->lock, flags);
1731
1732         IWL_DEBUG_MAC80211(priv, "leave\n");
1733         return 0;
1734 }
1735 EXPORT_SYMBOL(iwl_mac_conf_tx);
1736
1737 static void iwl_ht_conf(struct iwl_priv *priv,
1738                         struct ieee80211_bss_conf *bss_conf)
1739 {
1740         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1741         struct ieee80211_sta *sta;
1742
1743         IWL_DEBUG_MAC80211(priv, "enter:\n");
1744
1745         if (!ht_conf->is_ht)
1746                 return;
1747
1748         ht_conf->ht_protection =
1749                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
1750         ht_conf->non_GF_STA_present =
1751                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1752
1753         ht_conf->single_chain_sufficient = false;
1754
1755         switch (priv->iw_mode) {
1756         case NL80211_IFTYPE_STATION:
1757                 rcu_read_lock();
1758                 sta = ieee80211_find_sta(priv->vif, priv->bssid);
1759                 if (sta) {
1760                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1761                         int maxstreams;
1762
1763                         maxstreams = (ht_cap->mcs.tx_params &
1764                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1765                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1766                         maxstreams += 1;
1767
1768                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
1769                             (ht_cap->mcs.rx_mask[2] == 0))
1770                                 ht_conf->single_chain_sufficient = true;
1771                         if (maxstreams <= 1)
1772                                 ht_conf->single_chain_sufficient = true;
1773                 } else {
1774                         /*
1775                          * If at all, this can only happen through a race
1776                          * when the AP disconnects us while we're still
1777                          * setting up the connection, in that case mac80211
1778                          * will soon tell us about that.
1779                          */
1780                         ht_conf->single_chain_sufficient = true;
1781                 }
1782                 rcu_read_unlock();
1783                 break;
1784         case NL80211_IFTYPE_ADHOC:
1785                 ht_conf->single_chain_sufficient = true;
1786                 break;
1787         default:
1788                 break;
1789         }
1790
1791         IWL_DEBUG_MAC80211(priv, "leave\n");
1792 }
1793
1794 static inline void iwl_set_no_assoc(struct iwl_priv *priv)
1795 {
1796         priv->assoc_id = 0;
1797         iwl_led_disassociate(priv);
1798         /*
1799          * inform the ucode that there is no longer an
1800          * association and that no more packets should be
1801          * sent
1802          */
1803         priv->staging_rxon.filter_flags &=
1804                 ~RXON_FILTER_ASSOC_MSK;
1805         priv->staging_rxon.assoc_id = 0;
1806         iwlcore_commit_rxon(priv);
1807 }
1808
1809 void iwl_bss_info_changed(struct ieee80211_hw *hw,
1810                           struct ieee80211_vif *vif,
1811                           struct ieee80211_bss_conf *bss_conf,
1812                           u32 changes)
1813 {
1814         struct iwl_priv *priv = hw->priv;
1815         int ret;
1816
1817         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
1818
1819         if (!iwl_is_alive(priv))
1820                 return;
1821
1822         mutex_lock(&priv->mutex);
1823
1824         if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_AP) {
1825                 dev_kfree_skb(priv->ibss_beacon);
1826                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
1827         }
1828
1829         if (changes & BSS_CHANGED_BEACON_INT) {
1830                 priv->beacon_int = bss_conf->beacon_int;
1831                 /* TODO: in AP mode, do something to make this take effect */
1832         }
1833
1834         if (changes & BSS_CHANGED_BSSID) {
1835                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
1836
1837                 /*
1838                  * If there is currently a HW scan going on in the
1839                  * background then we need to cancel it else the RXON
1840                  * below/in post_associate will fail.
1841                  */
1842                 if (iwl_scan_cancel_timeout(priv, 100)) {
1843                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1844                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
1845                         mutex_unlock(&priv->mutex);
1846                         return;
1847                 }
1848
1849                 /* mac80211 only sets assoc when in STATION mode */
1850                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
1851                         memcpy(priv->staging_rxon.bssid_addr,
1852                                bss_conf->bssid, ETH_ALEN);
1853
1854                         /* currently needed in a few places */
1855                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1856                 } else {
1857                         priv->staging_rxon.filter_flags &=
1858                                 ~RXON_FILTER_ASSOC_MSK;
1859                 }
1860
1861         }
1862
1863         /*
1864          * This needs to be after setting the BSSID in case
1865          * mac80211 decides to do both changes at once because
1866          * it will invoke post_associate.
1867          */
1868         if (vif->type == NL80211_IFTYPE_ADHOC &&
1869             changes & BSS_CHANGED_BEACON) {
1870                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
1871
1872                 if (beacon)
1873                         iwl_mac_beacon_update(hw, beacon);
1874         }
1875
1876         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
1877                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
1878                                    bss_conf->use_short_preamble);
1879                 if (bss_conf->use_short_preamble)
1880                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1881                 else
1882                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1883         }
1884
1885         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
1886                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
1887                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1888                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
1889                 else
1890                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1891         }
1892
1893         if (changes & BSS_CHANGED_BASIC_RATES) {
1894                 /* XXX use this information
1895                  *
1896                  * To do that, remove code from iwl_set_rate() and put something
1897                  * like this here:
1898                  *
1899                 if (A-band)
1900                         priv->staging_rxon.ofdm_basic_rates =
1901                                 bss_conf->basic_rates;
1902                 else
1903                         priv->staging_rxon.ofdm_basic_rates =
1904                                 bss_conf->basic_rates >> 4;
1905                         priv->staging_rxon.cck_basic_rates =
1906                                 bss_conf->basic_rates & 0xF;
1907                  */
1908         }
1909
1910         if (changes & BSS_CHANGED_HT) {
1911                 iwl_ht_conf(priv, bss_conf);
1912
1913                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1914                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1915         }
1916
1917         if (changes & BSS_CHANGED_ASSOC) {
1918                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
1919                 if (bss_conf->assoc) {
1920                         priv->assoc_id = bss_conf->aid;
1921                         priv->beacon_int = bss_conf->beacon_int;
1922                         priv->timestamp = bss_conf->timestamp;
1923                         priv->assoc_capability = bss_conf->assoc_capability;
1924
1925                         iwl_led_associate(priv);
1926
1927                         if (!iwl_is_rfkill(priv))
1928                                 priv->cfg->ops->lib->post_associate(priv);
1929                 } else
1930                         iwl_set_no_assoc(priv);
1931         }
1932
1933         if (changes && iwl_is_associated(priv) && priv->assoc_id) {
1934                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
1935                                    changes);
1936                 ret = iwl_send_rxon_assoc(priv);
1937                 if (!ret) {
1938                         /* Sync active_rxon with latest change. */
1939                         memcpy((void *)&priv->active_rxon,
1940                                 &priv->staging_rxon,
1941                                 sizeof(struct iwl_rxon_cmd));
1942                 }
1943         }
1944
1945         if (changes & BSS_CHANGED_BEACON_ENABLED) {
1946                 if (vif->bss_conf.enable_beacon) {
1947                         memcpy(priv->staging_rxon.bssid_addr,
1948                                bss_conf->bssid, ETH_ALEN);
1949                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1950                         iwlcore_config_ap(priv);
1951                 } else
1952                         iwl_set_no_assoc(priv);
1953         }
1954
1955         if (changes & BSS_CHANGED_IBSS) {
1956                 ret = priv->cfg->ops->lib->manage_ibss_station(priv, vif,
1957                                                         bss_conf->ibss_joined);
1958                 if (ret)
1959                         IWL_ERR(priv, "failed to %s IBSS station %pM\n",
1960                                 bss_conf->ibss_joined ? "add" : "remove",
1961                                 bss_conf->bssid);
1962         }
1963
1964         mutex_unlock(&priv->mutex);
1965
1966         IWL_DEBUG_MAC80211(priv, "leave\n");
1967 }
1968 EXPORT_SYMBOL(iwl_bss_info_changed);
1969
1970 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
1971 {
1972         struct iwl_priv *priv = hw->priv;
1973         unsigned long flags;
1974         __le64 timestamp;
1975
1976         IWL_DEBUG_MAC80211(priv, "enter\n");
1977
1978         if (!iwl_is_ready_rf(priv)) {
1979                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1980                 return -EIO;
1981         }
1982
1983         spin_lock_irqsave(&priv->lock, flags);
1984
1985         if (priv->ibss_beacon)
1986                 dev_kfree_skb(priv->ibss_beacon);
1987
1988         priv->ibss_beacon = skb;
1989
1990         priv->assoc_id = 0;
1991         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
1992         priv->timestamp = le64_to_cpu(timestamp);
1993
1994         IWL_DEBUG_MAC80211(priv, "leave\n");
1995         spin_unlock_irqrestore(&priv->lock, flags);
1996
1997         priv->cfg->ops->lib->post_associate(priv);
1998
1999         return 0;
2000 }
2001 EXPORT_SYMBOL(iwl_mac_beacon_update);
2002
2003 static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif)
2004 {
2005         iwl_connection_init_rx_config(priv, vif->type);
2006
2007         if (priv->cfg->ops->hcmd->set_rxon_chain)
2008                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2009
2010         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2011
2012         return iwlcore_commit_rxon(priv);
2013 }
2014
2015 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2016 {
2017         struct iwl_priv *priv = hw->priv;
2018         int err = 0;
2019
2020         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", vif->type);
2021
2022         mutex_lock(&priv->mutex);
2023
2024         if (WARN_ON(!iwl_is_ready_rf(priv))) {
2025                 err = -EINVAL;
2026                 goto out;
2027         }
2028
2029         if (priv->vif) {
2030                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2031                 err = -EOPNOTSUPP;
2032                 goto out;
2033         }
2034
2035         priv->vif = vif;
2036         priv->iw_mode = vif->type;
2037
2038         IWL_DEBUG_MAC80211(priv, "Set %pM\n", vif->addr);
2039         memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
2040
2041         err = iwl_set_mode(priv, vif);
2042         if (err)
2043                 goto out_err;
2044
2045         /* Add the broadcast address so we can send broadcast frames */
2046         err = priv->cfg->ops->lib->add_bcast_station(priv);
2047         if (err)
2048                 goto out_err;
2049
2050         goto out;
2051
2052  out_err:
2053         priv->vif = NULL;
2054         priv->iw_mode = NL80211_IFTYPE_STATION;
2055  out:
2056         mutex_unlock(&priv->mutex);
2057
2058         IWL_DEBUG_MAC80211(priv, "leave\n");
2059         return err;
2060 }
2061 EXPORT_SYMBOL(iwl_mac_add_interface);
2062
2063 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2064                               struct ieee80211_vif *vif)
2065 {
2066         struct iwl_priv *priv = hw->priv;
2067
2068         IWL_DEBUG_MAC80211(priv, "enter\n");
2069
2070         mutex_lock(&priv->mutex);
2071
2072         iwl_clear_ucode_stations(priv, true);
2073
2074         if (iwl_is_ready_rf(priv)) {
2075                 iwl_scan_cancel_timeout(priv, 100);
2076                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2077                 iwlcore_commit_rxon(priv);
2078         }
2079         if (priv->vif == vif) {
2080                 priv->vif = NULL;
2081                 memset(priv->bssid, 0, ETH_ALEN);
2082         }
2083         mutex_unlock(&priv->mutex);
2084
2085         IWL_DEBUG_MAC80211(priv, "leave\n");
2086
2087 }
2088 EXPORT_SYMBOL(iwl_mac_remove_interface);
2089
2090 /**
2091  * iwl_mac_config - mac80211 config callback
2092  */
2093 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2094 {
2095         struct iwl_priv *priv = hw->priv;
2096         const struct iwl_channel_info *ch_info;
2097         struct ieee80211_conf *conf = &hw->conf;
2098         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2099         unsigned long flags = 0;
2100         int ret = 0;
2101         u16 ch;
2102         int scan_active = 0;
2103
2104         mutex_lock(&priv->mutex);
2105
2106         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2107                                         conf->channel->hw_value, changed);
2108
2109         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2110                         test_bit(STATUS_SCANNING, &priv->status))) {
2111                 scan_active = 1;
2112                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2113         }
2114
2115         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2116                        IEEE80211_CONF_CHANGE_CHANNEL)) {
2117                 /* mac80211 uses static for non-HT which is what we want */
2118                 priv->current_ht_config.smps = conf->smps_mode;
2119
2120                 /*
2121                  * Recalculate chain counts.
2122                  *
2123                  * If monitor mode is enabled then mac80211 will
2124                  * set up the SM PS mode to OFF if an HT channel is
2125                  * configured.
2126                  */
2127                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2128                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2129         }
2130
2131         /* during scanning mac80211 will delay channel setting until
2132          * scan finish with changed = 0
2133          */
2134         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2135                 if (scan_active)
2136                         goto set_ch_out;
2137
2138                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2139                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2140                 if (!is_channel_valid(ch_info)) {
2141                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2142                         ret = -EINVAL;
2143                         goto set_ch_out;
2144                 }
2145
2146                 spin_lock_irqsave(&priv->lock, flags);
2147
2148                 /* Configure HT40 channels */
2149                 ht_conf->is_ht = conf_is_ht(conf);
2150                 if (ht_conf->is_ht) {
2151                         if (conf_is_ht40_minus(conf)) {
2152                                 ht_conf->extension_chan_offset =
2153                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2154                                 ht_conf->is_40mhz = true;
2155                         } else if (conf_is_ht40_plus(conf)) {
2156                                 ht_conf->extension_chan_offset =
2157                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2158                                 ht_conf->is_40mhz = true;
2159                         } else {
2160                                 ht_conf->extension_chan_offset =
2161                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2162                                 ht_conf->is_40mhz = false;
2163                         }
2164                 } else
2165                         ht_conf->is_40mhz = false;
2166                 /* Default to no protection. Protection mode will later be set
2167                  * from BSS config in iwl_ht_conf */
2168                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2169
2170                 /* if we are switching from ht to 2.4 clear flags
2171                  * from any ht related info since 2.4 does not
2172                  * support ht */
2173                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2174                         priv->staging_rxon.flags = 0;
2175
2176                 iwl_set_rxon_channel(priv, conf->channel);
2177                 iwl_set_rxon_ht(priv, ht_conf);
2178
2179                 iwl_set_flags_for_band(priv, conf->channel->band);
2180                 spin_unlock_irqrestore(&priv->lock, flags);
2181                 if (iwl_is_associated(priv) &&
2182                     (le16_to_cpu(priv->active_rxon.channel) != ch) &&
2183                     priv->cfg->ops->lib->set_channel_switch) {
2184                         iwl_set_rate(priv);
2185                         /*
2186                          * at this point, staging_rxon has the
2187                          * configuration for channel switch
2188                          */
2189                         ret = priv->cfg->ops->lib->set_channel_switch(priv,
2190                                 ch);
2191                         if (!ret) {
2192                                 iwl_print_rx_config_cmd(priv);
2193                                 goto out;
2194                         }
2195                         priv->switch_rxon.switch_in_progress = false;
2196                 }
2197  set_ch_out:
2198                 /* The list of supported rates and rate mask can be different
2199                  * for each band; since the band may have changed, reset
2200                  * the rate mask to what mac80211 lists */
2201                 iwl_set_rate(priv);
2202         }
2203
2204         if (changed & (IEEE80211_CONF_CHANGE_PS |
2205                         IEEE80211_CONF_CHANGE_IDLE)) {
2206                 ret = iwl_power_update_mode(priv, false);
2207                 if (ret)
2208                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2209         }
2210
2211         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2212                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2213                         priv->tx_power_user_lmt, conf->power_level);
2214
2215                 iwl_set_tx_power(priv, conf->power_level, false);
2216         }
2217
2218         if (changed & IEEE80211_CONF_CHANGE_QOS) {
2219                 bool qos_active = !!(conf->flags & IEEE80211_CONF_QOS);
2220
2221                 spin_lock_irqsave(&priv->lock, flags);
2222                 priv->qos_data.qos_active = qos_active;
2223                 iwl_update_qos(priv);
2224                 spin_unlock_irqrestore(&priv->lock, flags);
2225         }
2226
2227         if (!iwl_is_ready(priv)) {
2228                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2229                 goto out;
2230         }
2231
2232         if (scan_active)
2233                 goto out;
2234
2235         if (memcmp(&priv->active_rxon,
2236                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2237                 iwlcore_commit_rxon(priv);
2238         else
2239                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2240
2241
2242 out:
2243         IWL_DEBUG_MAC80211(priv, "leave\n");
2244         mutex_unlock(&priv->mutex);
2245         return ret;
2246 }
2247 EXPORT_SYMBOL(iwl_mac_config);
2248
2249 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2250 {
2251         struct iwl_priv *priv = hw->priv;
2252         unsigned long flags;
2253
2254         mutex_lock(&priv->mutex);
2255         IWL_DEBUG_MAC80211(priv, "enter\n");
2256
2257         spin_lock_irqsave(&priv->lock, flags);
2258         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2259         spin_unlock_irqrestore(&priv->lock, flags);
2260
2261         spin_lock_irqsave(&priv->lock, flags);
2262         priv->assoc_id = 0;
2263         priv->assoc_capability = 0;
2264
2265         /* new association get rid of ibss beacon skb */
2266         if (priv->ibss_beacon)
2267                 dev_kfree_skb(priv->ibss_beacon);
2268
2269         priv->ibss_beacon = NULL;
2270
2271         priv->beacon_int = priv->vif->bss_conf.beacon_int;
2272         priv->timestamp = 0;
2273
2274         spin_unlock_irqrestore(&priv->lock, flags);
2275
2276         if (!iwl_is_ready_rf(priv)) {
2277                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2278                 mutex_unlock(&priv->mutex);
2279                 return;
2280         }
2281
2282         /* we are restarting association process
2283          * clear RXON_FILTER_ASSOC_MSK bit
2284          */
2285         iwl_scan_cancel_timeout(priv, 100);
2286         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2287         iwlcore_commit_rxon(priv);
2288
2289         iwl_set_rate(priv);
2290
2291         mutex_unlock(&priv->mutex);
2292
2293         IWL_DEBUG_MAC80211(priv, "leave\n");
2294 }
2295 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2296
2297 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2298 {
2299         if (!priv->txq)
2300                 priv->txq = kzalloc(
2301                         sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2302                         GFP_KERNEL);
2303         if (!priv->txq) {
2304                 IWL_ERR(priv, "Not enough memory for txq\n");
2305                 return -ENOMEM;
2306         }
2307         return 0;
2308 }
2309 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2310
2311 void iwl_free_txq_mem(struct iwl_priv *priv)
2312 {
2313         kfree(priv->txq);
2314         priv->txq = NULL;
2315 }
2316 EXPORT_SYMBOL(iwl_free_txq_mem);
2317
2318 #ifdef CONFIG_IWLWIFI_DEBUGFS
2319
2320 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2321
2322 void iwl_reset_traffic_log(struct iwl_priv *priv)
2323 {
2324         priv->tx_traffic_idx = 0;
2325         priv->rx_traffic_idx = 0;
2326         if (priv->tx_traffic)
2327                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2328         if (priv->rx_traffic)
2329                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2330 }
2331
2332 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2333 {
2334         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2335
2336         if (iwl_debug_level & IWL_DL_TX) {
2337                 if (!priv->tx_traffic) {
2338                         priv->tx_traffic =
2339                                 kzalloc(traffic_size, GFP_KERNEL);
2340                         if (!priv->tx_traffic)
2341                                 return -ENOMEM;
2342                 }
2343         }
2344         if (iwl_debug_level & IWL_DL_RX) {
2345                 if (!priv->rx_traffic) {
2346                         priv->rx_traffic =
2347                                 kzalloc(traffic_size, GFP_KERNEL);
2348                         if (!priv->rx_traffic)
2349                                 return -ENOMEM;
2350                 }
2351         }
2352         iwl_reset_traffic_log(priv);
2353         return 0;
2354 }
2355 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2356
2357 void iwl_free_traffic_mem(struct iwl_priv *priv)
2358 {
2359         kfree(priv->tx_traffic);
2360         priv->tx_traffic = NULL;
2361
2362         kfree(priv->rx_traffic);
2363         priv->rx_traffic = NULL;
2364 }
2365 EXPORT_SYMBOL(iwl_free_traffic_mem);
2366
2367 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2368                       u16 length, struct ieee80211_hdr *header)
2369 {
2370         __le16 fc;
2371         u16 len;
2372
2373         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2374                 return;
2375
2376         if (!priv->tx_traffic)
2377                 return;
2378
2379         fc = header->frame_control;
2380         if (ieee80211_is_data(fc)) {
2381                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2382                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2383                 memcpy((priv->tx_traffic +
2384                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2385                        header, len);
2386                 priv->tx_traffic_idx =
2387                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2388         }
2389 }
2390 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2391
2392 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2393                       u16 length, struct ieee80211_hdr *header)
2394 {
2395         __le16 fc;
2396         u16 len;
2397
2398         if (likely(!(iwl_debug_level & IWL_DL_RX)))
2399                 return;
2400
2401         if (!priv->rx_traffic)
2402                 return;
2403
2404         fc = header->frame_control;
2405         if (ieee80211_is_data(fc)) {
2406                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2407                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2408                 memcpy((priv->rx_traffic +
2409                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2410                        header, len);
2411                 priv->rx_traffic_idx =
2412                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2413         }
2414 }
2415 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2416
2417 const char *get_mgmt_string(int cmd)
2418 {
2419         switch (cmd) {
2420                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2421                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2422                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2423                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2424                 IWL_CMD(MANAGEMENT_PROBE_REQ);
2425                 IWL_CMD(MANAGEMENT_PROBE_RESP);
2426                 IWL_CMD(MANAGEMENT_BEACON);
2427                 IWL_CMD(MANAGEMENT_ATIM);
2428                 IWL_CMD(MANAGEMENT_DISASSOC);
2429                 IWL_CMD(MANAGEMENT_AUTH);
2430                 IWL_CMD(MANAGEMENT_DEAUTH);
2431                 IWL_CMD(MANAGEMENT_ACTION);
2432         default:
2433                 return "UNKNOWN";
2434
2435         }
2436 }
2437
2438 const char *get_ctrl_string(int cmd)
2439 {
2440         switch (cmd) {
2441                 IWL_CMD(CONTROL_BACK_REQ);
2442                 IWL_CMD(CONTROL_BACK);
2443                 IWL_CMD(CONTROL_PSPOLL);
2444                 IWL_CMD(CONTROL_RTS);
2445                 IWL_CMD(CONTROL_CTS);
2446                 IWL_CMD(CONTROL_ACK);
2447                 IWL_CMD(CONTROL_CFEND);
2448                 IWL_CMD(CONTROL_CFENDACK);
2449         default:
2450                 return "UNKNOWN";
2451
2452         }
2453 }
2454
2455 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2456 {
2457         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2458         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2459         priv->led_tpt = 0;
2460 }
2461
2462 /*
2463  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2464  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2465  * Use debugFs to display the rx/rx_statistics
2466  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2467  * information will be recorded, but DATA pkt still will be recorded
2468  * for the reason of iwl_led.c need to control the led blinking based on
2469  * number of tx and rx data.
2470  *
2471  */
2472 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2473 {
2474         struct traffic_stats    *stats;
2475
2476         if (is_tx)
2477                 stats = &priv->tx_stats;
2478         else
2479                 stats = &priv->rx_stats;
2480
2481         if (ieee80211_is_mgmt(fc)) {
2482                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2483                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2484                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2485                         break;
2486                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2487                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2488                         break;
2489                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2490                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2491                         break;
2492                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2493                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2494                         break;
2495                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2496                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2497                         break;
2498                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2499                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2500                         break;
2501                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2502                         stats->mgmt[MANAGEMENT_BEACON]++;
2503                         break;
2504                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2505                         stats->mgmt[MANAGEMENT_ATIM]++;
2506                         break;
2507                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2508                         stats->mgmt[MANAGEMENT_DISASSOC]++;
2509                         break;
2510                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2511                         stats->mgmt[MANAGEMENT_AUTH]++;
2512                         break;
2513                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2514                         stats->mgmt[MANAGEMENT_DEAUTH]++;
2515                         break;
2516                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2517                         stats->mgmt[MANAGEMENT_ACTION]++;
2518                         break;
2519                 }
2520         } else if (ieee80211_is_ctl(fc)) {
2521                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2522                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2523                         stats->ctrl[CONTROL_BACK_REQ]++;
2524                         break;
2525                 case cpu_to_le16(IEEE80211_STYPE_BACK):
2526                         stats->ctrl[CONTROL_BACK]++;
2527                         break;
2528                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2529                         stats->ctrl[CONTROL_PSPOLL]++;
2530                         break;
2531                 case cpu_to_le16(IEEE80211_STYPE_RTS):
2532                         stats->ctrl[CONTROL_RTS]++;
2533                         break;
2534                 case cpu_to_le16(IEEE80211_STYPE_CTS):
2535                         stats->ctrl[CONTROL_CTS]++;
2536                         break;
2537                 case cpu_to_le16(IEEE80211_STYPE_ACK):
2538                         stats->ctrl[CONTROL_ACK]++;
2539                         break;
2540                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2541                         stats->ctrl[CONTROL_CFEND]++;
2542                         break;
2543                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2544                         stats->ctrl[CONTROL_CFENDACK]++;
2545                         break;
2546                 }
2547         } else {
2548                 /* data */
2549                 stats->data_cnt++;
2550                 stats->data_bytes += len;
2551         }
2552         iwl_leds_background(priv);
2553 }
2554 EXPORT_SYMBOL(iwl_update_stats);
2555 #endif
2556
2557 const static char *get_csr_string(int cmd)
2558 {
2559         switch (cmd) {
2560                 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2561                 IWL_CMD(CSR_INT_COALESCING);
2562                 IWL_CMD(CSR_INT);
2563                 IWL_CMD(CSR_INT_MASK);
2564                 IWL_CMD(CSR_FH_INT_STATUS);
2565                 IWL_CMD(CSR_GPIO_IN);
2566                 IWL_CMD(CSR_RESET);
2567                 IWL_CMD(CSR_GP_CNTRL);
2568                 IWL_CMD(CSR_HW_REV);
2569                 IWL_CMD(CSR_EEPROM_REG);
2570                 IWL_CMD(CSR_EEPROM_GP);
2571                 IWL_CMD(CSR_OTP_GP_REG);
2572                 IWL_CMD(CSR_GIO_REG);
2573                 IWL_CMD(CSR_GP_UCODE_REG);
2574                 IWL_CMD(CSR_GP_DRIVER_REG);
2575                 IWL_CMD(CSR_UCODE_DRV_GP1);
2576                 IWL_CMD(CSR_UCODE_DRV_GP2);
2577                 IWL_CMD(CSR_LED_REG);
2578                 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2579                 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2580                 IWL_CMD(CSR_ANA_PLL_CFG);
2581                 IWL_CMD(CSR_HW_REV_WA_REG);
2582                 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2583         default:
2584                 return "UNKNOWN";
2585
2586         }
2587 }
2588
2589 void iwl_dump_csr(struct iwl_priv *priv)
2590 {
2591         int i;
2592         u32 csr_tbl[] = {
2593                 CSR_HW_IF_CONFIG_REG,
2594                 CSR_INT_COALESCING,
2595                 CSR_INT,
2596                 CSR_INT_MASK,
2597                 CSR_FH_INT_STATUS,
2598                 CSR_GPIO_IN,
2599                 CSR_RESET,
2600                 CSR_GP_CNTRL,
2601                 CSR_HW_REV,
2602                 CSR_EEPROM_REG,
2603                 CSR_EEPROM_GP,
2604                 CSR_OTP_GP_REG,
2605                 CSR_GIO_REG,
2606                 CSR_GP_UCODE_REG,
2607                 CSR_GP_DRIVER_REG,
2608                 CSR_UCODE_DRV_GP1,
2609                 CSR_UCODE_DRV_GP2,
2610                 CSR_LED_REG,
2611                 CSR_DRAM_INT_TBL_REG,
2612                 CSR_GIO_CHICKEN_BITS,
2613                 CSR_ANA_PLL_CFG,
2614                 CSR_HW_REV_WA_REG,
2615                 CSR_DBG_HPET_MEM_REG
2616         };
2617         IWL_ERR(priv, "CSR values:\n");
2618         IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2619                 "CSR_INT_PERIODIC_REG)\n");
2620         for (i = 0; i <  ARRAY_SIZE(csr_tbl); i++) {
2621                 IWL_ERR(priv, "  %25s: 0X%08x\n",
2622                         get_csr_string(csr_tbl[i]),
2623                         iwl_read32(priv, csr_tbl[i]));
2624         }
2625 }
2626 EXPORT_SYMBOL(iwl_dump_csr);
2627
2628 const static char *get_fh_string(int cmd)
2629 {
2630         switch (cmd) {
2631                 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2632                 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2633                 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2634                 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2635                 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2636                 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2637                 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2638                 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2639                 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2640         default:
2641                 return "UNKNOWN";
2642
2643         }
2644 }
2645
2646 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2647 {
2648         int i;
2649 #ifdef CONFIG_IWLWIFI_DEBUG
2650         int pos = 0;
2651         size_t bufsz = 0;
2652 #endif
2653         u32 fh_tbl[] = {
2654                 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2655                 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2656                 FH_RSCSR_CHNL0_WPTR,
2657                 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2658                 FH_MEM_RSSR_SHARED_CTRL_REG,
2659                 FH_MEM_RSSR_RX_STATUS_REG,
2660                 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2661                 FH_TSSR_TX_STATUS_REG,
2662                 FH_TSSR_TX_ERROR_REG
2663         };
2664 #ifdef CONFIG_IWLWIFI_DEBUG
2665         if (display) {
2666                 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2667                 *buf = kmalloc(bufsz, GFP_KERNEL);
2668                 if (!*buf)
2669                         return -ENOMEM;
2670                 pos += scnprintf(*buf + pos, bufsz - pos,
2671                                 "FH register values:\n");
2672                 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2673                         pos += scnprintf(*buf + pos, bufsz - pos,
2674                                 "  %34s: 0X%08x\n",
2675                                 get_fh_string(fh_tbl[i]),
2676                                 iwl_read_direct32(priv, fh_tbl[i]));
2677                 }
2678                 return pos;
2679         }
2680 #endif
2681         IWL_ERR(priv, "FH register values:\n");
2682         for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++) {
2683                 IWL_ERR(priv, "  %34s: 0X%08x\n",
2684                         get_fh_string(fh_tbl[i]),
2685                         iwl_read_direct32(priv, fh_tbl[i]));
2686         }
2687         return 0;
2688 }
2689 EXPORT_SYMBOL(iwl_dump_fh);
2690
2691 static void iwl_force_rf_reset(struct iwl_priv *priv)
2692 {
2693         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2694                 return;
2695
2696         if (!iwl_is_associated(priv)) {
2697                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
2698                 return;
2699         }
2700         /*
2701          * There is no easy and better way to force reset the radio,
2702          * the only known method is switching channel which will force to
2703          * reset and tune the radio.
2704          * Use internal short scan (single channel) operation to should
2705          * achieve this objective.
2706          * Driver should reset the radio when number of consecutive missed
2707          * beacon, or any other uCode error condition detected.
2708          */
2709         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
2710         iwl_internal_short_hw_scan(priv);
2711 }
2712
2713
2714 int iwl_force_reset(struct iwl_priv *priv, int mode)
2715 {
2716         struct iwl_force_reset *force_reset;
2717
2718         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2719                 return -EINVAL;
2720
2721         if (mode >= IWL_MAX_FORCE_RESET) {
2722                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
2723                 return -EINVAL;
2724         }
2725         force_reset = &priv->force_reset[mode];
2726         force_reset->reset_request_count++;
2727         if (force_reset->last_force_reset_jiffies &&
2728             time_after(force_reset->last_force_reset_jiffies +
2729             force_reset->reset_duration, jiffies)) {
2730                 IWL_DEBUG_INFO(priv, "force reset rejected\n");
2731                 force_reset->reset_reject_count++;
2732                 return -EAGAIN;
2733         }
2734         force_reset->reset_success_count++;
2735         force_reset->last_force_reset_jiffies = jiffies;
2736         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
2737         switch (mode) {
2738         case IWL_RF_RESET:
2739                 iwl_force_rf_reset(priv);
2740                 break;
2741         case IWL_FW_RESET:
2742                 IWL_ERR(priv, "On demand firmware reload\n");
2743                 /* Set the FW error flag -- cleared on iwl_down */
2744                 set_bit(STATUS_FW_ERROR, &priv->status);
2745                 wake_up_interruptible(&priv->wait_command_queue);
2746                 /*
2747                  * Keep the restart process from trying to send host
2748                  * commands by clearing the INIT status bit
2749                  */
2750                 clear_bit(STATUS_READY, &priv->status);
2751                 queue_work(priv->workqueue, &priv->restart);
2752                 break;
2753         }
2754         return 0;
2755 }
2756 EXPORT_SYMBOL(iwl_force_reset);
2757
2758 /**
2759  * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
2760  *
2761  * During normal condition (no queue is stuck), the timer is continually set to
2762  * execute every monitor_recover_period milliseconds after the last timer
2763  * expired.  When the queue read_ptr is at the same place, the timer is
2764  * shorten to 100mSecs.  This is
2765  *      1) to reduce the chance that the read_ptr may wrap around (not stuck)
2766  *      2) to detect the stuck queues quicker before the station and AP can
2767  *      disassociate each other.
2768  *
2769  * This function monitors all the tx queues and recover from it if any
2770  * of the queues are stuck.
2771  * 1. It first check the cmd queue for stuck conditions.  If it is stuck,
2772  *      it will recover by resetting the firmware and return.
2773  * 2. Then, it checks for station association.  If it associates it will check
2774  *      other queues.  If any queue is stuck, it will recover by resetting
2775  *      the firmware.
2776  * Note: It the number of times the queue read_ptr to be at the same place to
2777  *      be MAX_REPEAT+1 in order to consider to be stuck.
2778  */
2779 /*
2780  * The maximum number of times the read pointer of the tx queue at the
2781  * same place without considering to be stuck.
2782  */
2783 #define MAX_REPEAT      (2)
2784 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
2785 {
2786         struct iwl_tx_queue *txq;
2787         struct iwl_queue *q;
2788
2789         txq = &priv->txq[cnt];
2790         q = &txq->q;
2791         /* queue is empty, skip */
2792         if (q->read_ptr != q->write_ptr) {
2793                 if (q->read_ptr == q->last_read_ptr) {
2794                         /* a queue has not been read from last time */
2795                         if (q->repeat_same_read_ptr > MAX_REPEAT) {
2796                                 IWL_ERR(priv,
2797                                         "queue %d stuck %d time. Fw reload.\n",
2798                                         q->id, q->repeat_same_read_ptr);
2799                                 q->repeat_same_read_ptr = 0;
2800                                 iwl_force_reset(priv, IWL_FW_RESET);
2801                         } else {
2802                                 q->repeat_same_read_ptr++;
2803                                 IWL_DEBUG_RADIO(priv,
2804                                                 "queue %d, not read %d time\n",
2805                                                 q->id,
2806                                                 q->repeat_same_read_ptr);
2807                                 mod_timer(&priv->monitor_recover, jiffies +
2808                                         msecs_to_jiffies(IWL_ONE_HUNDRED_MSECS));
2809                         }
2810                         return 1;
2811                 } else {
2812                         q->last_read_ptr = q->read_ptr;
2813                         q->repeat_same_read_ptr = 0;
2814                 }
2815         }
2816         return 0;
2817 }
2818
2819 void iwl_bg_monitor_recover(unsigned long data)
2820 {
2821         struct iwl_priv *priv = (struct iwl_priv *)data;
2822         int cnt;
2823
2824         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2825                 return;
2826
2827         /* monitor and check for stuck cmd queue */
2828         if (iwl_check_stuck_queue(priv, IWL_CMD_QUEUE_NUM))
2829                 return;
2830
2831         /* monitor and check for other stuck queues */
2832         if (iwl_is_associated(priv)) {
2833                 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
2834                         /* skip as we already checked the command queue */
2835                         if (cnt == IWL_CMD_QUEUE_NUM)
2836                                 continue;
2837                         if (iwl_check_stuck_queue(priv, cnt))
2838                                 return;
2839                 }
2840         }
2841         /*
2842          * Reschedule the timer to occur in
2843          * priv->cfg->monitor_recover_period
2844          */
2845         mod_timer(&priv->monitor_recover,
2846                 jiffies + msecs_to_jiffies(priv->cfg->monitor_recover_period));
2847 }
2848 EXPORT_SYMBOL(iwl_bg_monitor_recover);
2849
2850 #ifdef CONFIG_PM
2851
2852 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2853 {
2854         struct iwl_priv *priv = pci_get_drvdata(pdev);
2855
2856         /*
2857          * This function is called when system goes into suspend state
2858          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2859          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2860          * it will not call apm_ops.stop() to stop the DMA operation.
2861          * Calling apm_ops.stop here to make sure we stop the DMA.
2862          */
2863         priv->cfg->ops->lib->apm_ops.stop(priv);
2864
2865         pci_save_state(pdev);
2866         pci_disable_device(pdev);
2867         pci_set_power_state(pdev, PCI_D3hot);
2868
2869         return 0;
2870 }
2871 EXPORT_SYMBOL(iwl_pci_suspend);
2872
2873 int iwl_pci_resume(struct pci_dev *pdev)
2874 {
2875         struct iwl_priv *priv = pci_get_drvdata(pdev);
2876         int ret;
2877
2878         /*
2879          * We disable the RETRY_TIMEOUT register (0x41) to keep
2880          * PCI Tx retries from interfering with C3 CPU state.
2881          */
2882         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2883
2884         pci_set_power_state(pdev, PCI_D0);
2885         ret = pci_enable_device(pdev);
2886         if (ret)
2887                 return ret;
2888         pci_restore_state(pdev);
2889         iwl_enable_interrupts(priv);
2890
2891         return 0;
2892 }
2893 EXPORT_SYMBOL(iwl_pci_resume);
2894
2895 #endif /* CONFIG_PM */